Perez, a 24-year-old left-hander, will represent the Jays on the World team. He was signed by Toronto as a non-drafted free agent in 2003, and is in the midst of his first season in Double-A after spending last year with Class A Lansing. He has made 14 starts for the Eastern League's New Hampshire Fisher Cats, going 4-6.
Perez has improved his ERA since advancing to Double-A, posting a mark of 3.46 this year, down from 3.60 in 2008. He led his team in innings pitched last year, and his 83 1/3 innings lead his club this year as well. Perez has allowed 70 hits and 32 walks over that span.
The southpaw has struck out twice as many batters as he's walked this year, and has kept the ball in the park, allowing only four home runs for an average of 0.4 per nine innings.
Erika Gilbert is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.