Snider suffered the injury during Thursday night's game with Triple-A Las Vegas. He attempted to make a diving catch and reinjured the same area that posed him problems in 2011.
"MRI was clean," Blue Jays manager John Farrell said. "It is a jammed wrist; the X-rays showed no fractures of any kind. He's probably seven days until game activity."
Snider was unsuccessful in his bid for a starting job in left field during Spring Training but has been on a roll in Las Vegas. The 24-year-old is batting .400 (30-for-75) with four home runs and 23 RBIs in 19 Minor League games this year.
The native of Kirkland, Wash., is a career .248 hitter in parts of four years at the big league level.