The setback will take Guerrero up to opening day, which means he likely will not make the active roster to start the season. Guerro’s status to start the 2019 season in the minors has come under controversy and caught the attention of the Major League Baseball Players Association in recent weeks.The organization indicated earlier this month that they will monitor Toronto to ensure it isn’t manipulating the young slugger’s service time.Despite slashing .381/.437/.636 with 20 home runs in the minors, Guerrero didn’t get a September call-up last season. Per #BlueJays, Vladimir Guerrero Jr. has a grade 1 strain of his left oblique. Happened on Friday March 8.Team estimates he’ll be back in three weeks.— Ben Nicholson-Smith (@bnicholsonsmith) March 10, 2019Guerrero initially suffered the injury Friday against Pittsburgh in his most recent Grapefruit League game, but it’s not clear how or when the injury happened. Blue Jays top prospect Vladimir Guerrero Jr. will be sidelined due to a grade 1 strain of his left oblique. The 19-year-old third baseman is expected to miss three weeks, the team announced Sunday (via Sportsnet).