Minnesota Vikings 2014 season After trading down twice from 148th and 168th, the
Minnesota Vikings selected Exum in the sixth round (182nd overall) of the
2014 NFL draft. Many analysts stated that, had he stayed healthy all year, he most likely would have been a 1st–2nd round pick. Exum became the first safety drafted by the Vikings since the club selected
Harrison Smith 29th overall in the
2012 NFL draft. He was also the highest selected defensive back of the 3 picked by the Vikings in the
2014 NFL draft. Exum played in 15 games (the 2nd most by a Vikings rookie behind DT
Shamar Stephen) with no starts during his rookie campaign, contributing heavily on special teams. He was tied for 5th on the team with 7 special teams tackles, compiling 3 of them in the final 4 games of the season. He finished the season with 6
tackles (4 solo).
2015 season Exum was one of just two Vikings defenders to play every snap (64) in the 20–10 win over the
Atlanta Falcons in Week 12, and he had a strong day in his first career start (Harrison Smith was inactive with a knee injury) as the Vikings contained wide receiver
Julio Jones and the Falcons' fifth-ranked pass offense. Exum gave up only 16 yards in two passes targeted for him, knifed in to stop
Tevin Coleman for a four-yard loss at the goal line and recovered
Anthony Barr's forced fumble on Coleman's 46-yard run. Exum ended the game with three tackles (one for loss) and a fumble recovery. In Minnesota's Week 13 loss against the
Seattle Seahawks Exum tackled Seahawks running back
Thomas Rawls to force his first career fumble in the NFL.
2016 season Exum was waived/injured by the Vikings on August 30, 2016. He was then placed on injured reserve after clearing waivers.
2017 season After an injury in mini-camp, Exum went into the 2017 training camp healthy, and spent the first week of practice as a nickel corner after spending his first few seasons as a safety. He was waived by the Vikings on September 16, 2017.
San Francisco 49ers On November 7, 2017, Exum signed with the
San Francisco 49ers. On June 6, 2018, Exum re-signed with the 49ers. He was released on September 1, 2018, and was re-signed again on September 3, 2018. In Week 4 against
Philip Rivers and the
Los Angeles Chargers, Exum recorded his first career interception and touchdown. On March 14, 2019, Exum re-signed with the 49ers. On August 31, 2019, Exum was released but re-signed the next day. He was released on October 2, 2019. He was re-signed on December 4, 2019. On January 1, 2020, Exum was waived by the 49ers. ==Career statistics==