Toronto Blue Jays star prospect Vladimir Guerrero Jr. is out four weeks with a patellar tendon strain in his left knee, the team announced Sunday.
The 19-year-old third baseman will be re-evaluated following that timetable, the team said.
Guerrero, whose .407 batting average for Double-A New Hampshire leads all minor league hitters, was ranked as the No. 2 prospect in Major League Baseball by ESPN's Keith Law. Guerrero has 11 home runs and 55 RBIs in 53 games this season.
He had been placed on the seven-day disabled list Thursday.
His father, Vladimir Guerrero, will be inducted into the baseball Hall of Fame in Cooperstown, New York, this year.