The Oakland Raiders put forth some notable moves on Saturday that began with the surprising trade of All-Pro defensive end Khalil Mack to the Chicago Bears.

According to Ian Rapoport of The NFL Network, the Raiders have also added more depth to their quarterback position with the acquisition of veteran quarterback A.J. McCarron in a trade from the Buffalo Bills.

According to ESPN's Adam Schefter, the Bills received a fifth round pick from the Raiders in the deal.

The move has come with much surprise given that McCarron had previously been in the midst of a battle for the Bills starting quarterback job. He inked two-year, $10 million deal in free agency with Buffalo in free agency after spending his first four years in the league as the primary backup with the Cincinnati Bengals. This move is a clear signal that he had been pushed out of the running for the starting job, meaning that Nathan Peterman will likely have the first shot at the starting job with rookie Josh Allen as the primary backup.

Through his first four years in the league, McCarron made only 10 appearances, throwing for 920 yards while completing 64.7 percent of his passes for six touchdowns and two interceptions. He should immediately provide stability behind Pro Bowl quarterback Derek Carr while entering a competition with fellow backup Connor Cook. The move could also be an indication that the Raiders were not satisfied with the play of their backups throughout the preseason and decided to bring in outside help to have insurance behind Carr in case of an injury.

The Bills' decision to take Allen with their first round pick likely jumbled up McCarron's plans to compete for the starting quarterback job. For the time being, it puts him back in the position of sitting behind another franchise quarterback.