Raiders 2013 season: Rookie year McGloin was not drafted in the 2013 NFL Draft, but he was signed as an undrafted free agent by the Oakland Raiders after a visit, May 15, 2013. McGloin made the team and began the season 3rd on the depth chart, behind starter Terrelle Pryor and backup Matt Flynn. After Flynn's disappointing Week 4 showing (starting for an injured Pryor) against the Washington Redskins, McGloin was promoted past Flynn to be Pryor's backup. McGloin made his first NFL appearance during the fourth quarter of the November 3, 2013 game between the Raiders and the Philadelphia Eagles. He debuted as the Raiders' starting quarterback on November 17, 2013; along with Buffalo Bills quarterback Jeff Tuel, he was one of two undrafted rookie quarterbacks to start a game in the 2013 season, a historically rare occurrence. McGloin threw for three touchdowns and led the Raiders to a 28-23 victory over the Houston Texans. The next week, McGloin threw a go-ahead touchdown to Marcel Reece late in the fourth quarter of a 23-19 loss to the Tennessee Titans. In a Thanksgiving contest against the Dallas Cowboys, McGloin earned praise for his play in the loss and an honorable mention for Phil Simms's "All-Iron Award" for the most valuable player. Despite consistent play from McGloin, the Raiders lost their next four games, and Pryor retook the starting role for the final game of the season. McGloin's 259.0 passing yards per game is second only to Jake Delhomme in NFL history for an undrafted rookie. 2014 season In 2014, McGloin began the season behind rookie quarterback Derek Carr and backup Matt Schaub. He played in just one game, replacing an injured Carr midway through third quarter of a 38-14 loss to the Miami Dolphins during Week 4. He threw a touchdown and an interception in the loss. 2015 season In 2015, McGloin was promoted to second-string backup after Schaub was released during the offseason. He played just over two quarters for an injured Carr on opening day, throwing two fourth-quarter touchdowns to Reece in 33-13 loss to the Cincinnati Bengals, and appeared in just one other game that season. 2016 season McGloin appeared only briefly in two games early in the 2016 season behind a greatly improved Carr. However, in Week 16, Carr suffered a broken right fibula early in the 4th quarter on his only sack against the Indianapolis