2013–14 season Erram was drafted by the
Talk 'N Text Tropang Texters in the
2013 PBA Draft. It caught him off guard, as he expected to fall to the third round due to his knee injury. He was among six Ateneo players taken in that draft, along with Chua,
Greg Slaughter,
Ryan Buenafe,
Nico Salva, and
Chris Sumalinog. Erram was given a practice player contract. As he wasn't part of the main lineup, he used this time to finish his studies. After the season, Talk 'N Text left him unprotected for the
2014 expansion draft.
Blackwater Elite (2014–18) Erram was selected 11th overall during the expansion draft. In his PBA debut, he scored 10 points in a loss to the
KIA Sorento. He scored a season-high 21 points to go along with his eight rebounds and four blocks in a win over the
Meralco Bolts. In a
2015–16 Philippine Cup game versus the
San Miguel Beermen, Erram scored 23 points, his career-high at the time. Against the
GlobalPort Batang Pier, he scored nine points, 14 rebounds, and seven blocks, but they still lost. They got to their first quarterfinals in that conference. In a
Commissioner's Cup loss to the
Rain or Shine Elasto Painters, he scored 20 points. In a close game against the
Phoenix Fuel Masters, with seven seconds remaining and Blackwater down by three, he made a crucial rebound and found
Carlo Lastimosa, who made the game-tying triple. Although they lost in overtime and failed to make the playoffs, he finished that game with 18 points and 13 rebounds. In a
Governors' Cup game against Talk 'N Text, he went down with another ACL injury. He finished his sophomore season with 10.2 points, 6.8 rebounds and nearly two blocks a game. Despite the injury, he signed a two-year contract to stay with Blackwater. Nine months later, on May 31, 2017, during the
2017 Commissioner's Cup, Erram made his return to the court, playing six minutes. In the
Governors' Cup, he had 11 points, 15 rebounds, and seven blocks in a loss to the
Star Hotshots. He averaged 10.8 points, 9.3 rebounds and 2.3 blocks in the elimination round. Blackwater made its second playoff appearance in that conference. He followed that up with 20 points and four steals against TNT, but this time they lost. On January 19, 2018, against GlobalPort, he recorded a career-high 7 blocks in a 101–76 losing effort. Eight days later, Erram scored 14 points and grabbed a career-high 21 rebounds in a 84–88 loss to the
Alaska Aces. For the conference, he averaged 14.2 points, a league-leading 13.8 rebounds, and 2.9 blocks per game. He finished fifth in the voting for the
Best Player of the Conference award. That season, he was an All-Star, and also got to compete in the Obstacle Challenge during
All-Star Week. In the
Commissioner's Cup, Erram averaged 10.6 points, 8.2 rebounds, and 1.7 assists in 29.6 minutes per game. In the
Governors' Cup, Blackwater had its best start at 4–0. Their streak was snapped when he missed a game due to the flu and they lost to the
NLEX Road Warriors. They went on to make the playoffs, where they were eliminated by the Hotshots. He was named by the PBA Press Corps as the
Defensive Player of the Year for the
2017–18 season after averaging a league-leading 1.9 blocks. He also made the
Mythical Second Team. Aside from leading the league in blocks, he also had career-high averages of 12.4 points and 10.9 rebounds.
NLEX Road Warriors (2019) Days after the
2018 draft, Erram was traded to the
NLEX Road Warriors in a three-team trade for
Michael Miranda,
Abu Tratter, and
Paul Desiderio. In his NLEX debut during the
2019 Philippine Cup, Erram had 10 points, five rebounds, and two blocks in a loss to Rain or Shine. Against TNT, he had five blocks. He had five blocks again against the Columbian Dyip, but this time also scored 23 points, 10 rebounds, and six assists to lead NLEX to its first win of the season. He then made a game-winning block on Meralco's
Ranidel de Ocampo. For his performances, he was given a Player of the Week award. He also got selected to the PBA South All-Star team. In his first game against his former team Blackwater, he had a double-double of 20 points and 10 rebounds as he led NLEX to the win. NLEX however, failed to make the playoffs for that conference. In the first seven games of the
Commissioner's Cup, Erram struggled with off-court issues and NLEX only won once. He started to bounce back in a loss to Barangay Ginebra in which he had 20 points and 14 rebounds. Against Rain or Shine, he contributed 13 points, seven rebounds, and made the game-winning block on
Denzel Bowles. Erram missed two weeks of the
Governors' Cup due to an elbow injury. Despite the injury, NLEX was the first seed in the playoffs against NorthPort. In a Game 1 loss, he got ejected after a confrontation with NorthPort's import
Michael Qualls. That would be the last game he played for NLEX, as he was suspended one game for his actions and could only watch as NLEX was eliminated. This marked his return to the TNT franchise since they drafted him back in 2013.
2021: First PBA championship Erram made his TNT debut months later against Alaska with four points, eight rebounds, and six assists. Although he got ejected in the third quarter, TNT was still able to pull off the win due to
RR Pogoy's 45 points and
Jayson Castro's 28 points. In a win over San Miguel, he scored a career-high 27 points and also grabbed 15 rebounds. TNT started out 5–0, with their winning streak snapped by NLEX. From there, TNT made it to the
finals, making this his first-ever finals appearance. In the finals, they lost to Ginebra. He was named as a member of the PBA's Elite Five, with averages of 11.8 points, 9.7 rebounds, and 1.1 blocks in 22 games. In the
2021 Philippine Cup, Erram helped TNT claim first seed with 17 points and eight rebounds in a win over Alaska. In Game 1 of the semifinals against San Miguel, he scored 15 points and five rebounds as they took the win. During Game 4, he got accidentally hit in the head, and had to go to the hospital. TNT lost, and it was suspected that he fractured his cheekbone. Still, he was able to play the following game. TNT made it to the
finals against the Hotshots where in Game 1, he only scored six points, but led the team with 12 rebounds and four blocks off the bench. TNT went on to win the finals in six games. With the win, he won his first PBA title. In the second quarter of their game against the Hotshots, he injured his lower back. After sitting out a game, he made his return in a win over San Miguel. For that conference, TNT made it as far as the quarterfinals, where they lost to Ginebra.
2022–23: Second PBA championship Erram added 13 points and eight rebounds in a
2022 Philippine Cup win over Meralco. In an overtime win over Rain or Shine, he scored six of his 13 points in the extra period, including a two-point basket that eventually gave TNT the lead. They got their sixth win of the conference against the Batang Pier in which he had a double-double of 17 points and 14 rebounds. He then followed it up with nearly a double-double with 18 points and nine rebounds. TNT made it to the semifinals against the Hotshots. TNT won the first game, but lost Game 2 despite his 13 points. He then led the team with 22 points and eight rebounds the following game, and TNT took a 2–1 lead. He got his first double-double of the series in Game 4 with 19 points and 13 rebounds. The Hotshots fought back in Game 5 to bring the series to 3–2 despite his 16 points and nine rebounds. In Game 6, he was ejected from the game when he accidentally elbowed
Ian Sangalang in the head during the fourth quarter. Despite not having him to finish the game, TNT was still able to win to book a return to the
finals. In that semifinals series he averaged 14 points and 8.7 rebounds for TNT. In the finals against SMB, TNT went down 2–1. They battled back and took a 3–2 series lead with a Game 5 win. In that pivotal Game 5, he had 17 points, seven rebounds, and a game-high three blocks. He was able to perform well in that game despite suffering an ankle sprain in practice. In Game 7, he got ejected in the second quarter after elbowing San Miguel's
Mo Tautuaa in the head. Without him, and the team playing through multiple injuries, TNT lost the Philippine Cup title to San Miguel. Erram then missed the
Governors' Cup elimination round of TNT due to a knee procedure. He made his return in the quarterfinals against Phoenix. TNT made it back to the
finals against Ginebra where in Game 1, he fouled out. With TNT already having a depleted frontcourt without
Kelly Williams and
Justin Chua, Ginebra took the first win. After the game, head coach
Jojo Lastimosa and his teammates implored him to control his emotions better. He got five fouls the following game, but TNT won. In Game 3, he had his best game of the finals yet with 14 points, nine rebounds, and three rebounds. After the game, he informed officials that a fan had been heckling him with disrespectful insults about his mother, who had been going through a stroke. With Erram calling for better protection from the PBA, the league responded by adding more personnel in the venue to better police fan behavior. The team also rallied behind him by comforting him and supporting him on social media. He was able to focus on playing in Game 4 and contributed eight rebounds in the win. With Williams returning, and his renewed focus, TNT was able to win the finals in six games.
2023–24 season: Season absence In the offseason, Erram trained with
Gilas Pilipinas. However, he pulled out due to
bone spurs. ==National team career==