On June 25, 2009, Summers was selected with the 35th overall pick in the
2009 NBA draft by the
Detroit Pistons. In July 2009, he joined the Pistons for the 2009 NBA Summer League. In August 2009, he signed a multi-year deal with the Pistons. In July 2010, he re-joined the Pistons for the 2010 NBA Summer League. On July 3, 2011, he signed a two-year deal with
Montepaschi Siena of Italy. On October 30, 2011, he parted ways with Siena after just four games. On December 9, 2011, he signed with the
New Orleans Hornets. On February 7, 2012, he was waived by the Hornets. In September 2012, Summers signed with the
Charlotte Bobcats. However, he was later waived by the Bobcats on October 27, 2012. On December 3, 2012, Summers was acquired by the
Maine Red Claws. On February 4, 2013, Summers was named to the Futures All-Star roster for the 2013 NBA D-League All-Star Game. On March 15, 2013, Summers signed a 10-day contract with the Los Angeles Clippers. On March 25, 2013, he signed a second 10-day contract with the Clippers. On April 4, 2013, he signed with the Clippers for the remainder of the season. On July 9, 2013, Summers was waived by the Clippers. On July 31, 2013, Summers signed a one-year deal with
Budivelnyk Kyiv of the
Ukrainian Basketball SuperLeague. He sent his family home from
Kyiv due to
political unrest in Ukraine, but stayed to finish the season. In July 2014, Summers joined the Brooklyn Nets for the
2014 NBA Summer League. On August 12, 2014, he signed with
Gran Canaria of the
Liga ACB. On September 22, 2015, Summers signed with the
New York Knicks. However, he was later waived by the Knicks on October 23 after appearing in four preseason games. On November 2, he was acquired by the
Westchester Knicks as an affiliate player of New York. On November 23, he was named the D-League's Performer of the Week for games played Thursday, November 12, through Sunday, November 22. The honor marked the first of the 2015–16 season and the first in Westchester Knicks history. The following day, he was ruled out for the rest of the season with a left Achilles tendon injury, an injury he suffered on November 20 in the final two minutes of the team's win over the
Sioux Falls Skyforce and was waived on November 24. In three games, Summers led the Knicks to a 3–0 start and averaged 25.3 points, 10.3 rebounds, 2.0 assists and 2.0 steals per game. On August 3, 2017, he signed with Turkish club
Galatasaray for the 2017–18 season. On July 12, 2019, he has signed with
Levallois Metropolitans of the
LNB Pro A. Summers later joined
Shimane Susanoo Magic, averaging 17.4 points, 8.0 rebounds, 1.3 assists and 1.1 steals per game. On October 11, 2020, he signed with
Indios de Mayagüez of the
Baloncesto Superior Nacional (BSN). In September 2023, Summers signed with the
Rain or Shine Elasto Painters of the
Philippine Basketball Association (PBA) as the team's import for the
2023–24 PBA Commissioner's Cup. After a 0–4 start, he was released from the team and replaced by
Demetrius Treadwell. ==Career statistics==