Jansen was promoted to the Blue Jays' roster Sunday when infielder Yangervis Solarte (oblique) was placed on the 10-day disabled list but did not play in Toronto's 2-1 victory over Tampa Bay.
Jansen, who was ranked as Toronto's No. 6 prospect earlier this year by ESPN's Keith Law, is expected to catch his former Triple-A batterymate Reid-Foley on Monday in Kansas City. The Blue Jays are expected to promote Reid-Foley to replace Mike Hauschild in their rotation.
Jansen, 23, was batting .275 with 12 home runs and 58 RBIs this season at Triple-A Buffalo. He was removed from Buffalo's game Saturday when word of his promotion reached the dugout. Manager Bobby Meacham broke the news by telling Jansen, "Kid, you're going to the big leagues. I don't want to see you again.''
"It's like something I've never felt before, it was an amazing feeling," Jansen told MLB.com. "It really sunk in when I called my parents and got to talk to them -- some tears came out, everyone's happy, everyone's excited about it, and my brother actually lives in Kansas City, so it's a pretty awesome moment."
Reid-Foley, 22, went 12-4 in 23 combined starts between Buffalo and Double-A New Hampshire this season. The right-hander has been ranked by Law as the Blue Jays' No. 9 overall prospect.