Jason Bay (concussion) went 0-for-2 with two walks Monday in his third rehab game with Triple-A Buffalo. Bay also played entire game in left field, which included on embarrassing moment where he lost a ball in the lights. The veteran outfielder is 3-for-10 with three walks and three strikeouts in three games with the Bisons and hasn't had any setbacks following his concussion last month. The Mets have yet to make an official announcement, but the veteran outfielder is expected to be activated from the disabled list for Tuesday's game against the Nationals.