Waites' contract was selected from Triple-A Sacramento on Monday.
Waites started the year at Single-A Eugene and worked his way up to Triple-A Sacramento by the end of August, putting himself in a position for exactly this type of promotion. He didn't surrender a run at Triple-A, turning in a 0.86 WHIP and a 10:3 K:BB across seven frames out of the bullpen. Waites figures to serve as bullpen depth down the stretch of the regular season.