Laffey was in contention for one of two spots in Toronto's starting rotation during Spring Training, but he ultimately was sent to Triple-A Las Vegas on the final day of camp.
The 26-year-old made one start with the 51s, but he found out Sunday he was headed north after the Blue Jays optioned right-hander Joel Carreno to the Minors.
"Just being a swing man in the past and being able to pitch in both roles, I knew this could be a possibility," said Laffey, who will pitch out of the bullpen. "But this early? No, you don't expect it, you don't think about it. You have to pitch wherever you're at and just be ready when you're called. I was a little surprised, not shocked, but definitely ready to go."
Toronto had decided prior to Carreno's start on Sunday that he would be sent to the Minors after the game. The main reason for that was a pair of extra-innings games that required the Blue Jays to play 37 innings in their three-game set against the Indians.
That put a heavy workload on Toronto's bullpen, and with a fifth starter not being needed until April 21, the Blue Jays brass went ahead with the roster move. Carreno, who surrendered four runs in six innings, will once again be considered for a starting job, but it's possible Laffey will enter the mix as well.
"They're not going to stop evaluating after Spring Training," Laffey said. "It's going to lead into the season and it's going to continue depending on how guys develop, how they attack hitters. It's definitely an ongoing thing regardless of whether it goes through April, May or whatever it may be. Anything can happen at any given time in this game.
"You don't want to expect anything. You can't have too high of expectations. You really just have to worry about the day to day things that you can control, get better every day and be ready when your name's called. That's really how I approach it."
Laffey went 3-2 with a 3.88 ERA in 53 1/3 innings with the Mariners and Yankees last season.