Detroit selected Watson's contract from Triple-A Toledo and optioned him back to Toledo on Sunday.
According to Chris McCosky of The Detroit News, Watson recently received a lucrative offer to pitch overseas, so the Tigers upgraded him from his minor-league contract and added him to the 40-man roster to ensure he stuck around in the organization. Watson has excelled while working primarily out of the rotation this season at Toledo, posting a 3.33 ERA, 1.11 WHIP and 31:14 K:BB through 46 innings. In order to make room for Watson on the 40-man roster, the Tigers transferred Will Vest (elbow) from the 15-day injured list to the 60-day IL.