Dodgers minor-league pitcher Robert Carson was suspended 50 games Tuesday for a second positive test for a drug of abuse. (Getty Images)

Dodgers minor-league pitcher Robert Carson and outfielder Theo Alexander were suspended 50 games on Tuesday for a second positive test for a drug of abuse.

Carson, a 26-year-old left-hander, was one of seven minor-league pitchers whom the Dodgers invited to spring training. He has pitched in 31 major-league games in his career, all with the New York Mets from 2012-13. Carson finished last season with the Dodgers’ Triple-A affiliate, pitching in 18 games out of the bullpen with a 5.40 ERA.

Alexander, a seventh-round draft pick in 2012, was listed on the roster of Rookie-level Ogden. He batted .217 in 43 games with the Raptors last year.

Both suspensions are effective at the beginning of the regular season. Under the Joint Drug Agreement between MLB and the Players’ Association, all minor-league players are subject to random out-of-season testing.

Update (2:20 p.m.): Carson’s spring training invite has been rescinded. The Dodgers currently are inviting 16 players to spring training as non-roster invitees. The new list:

Pitchers (6): Chris Anderson, Ryan Buchter, David Huff, Josh Ravin, Sergio Santos, Julio Urias

Position players (10): Erisbel Arruebarrena, Buck Britton, Matt Carson, O’Koyea Dickson, Kyle Jensen, Chris O’Brien, Corey Seager, Ali Solis, Darnell Sweeney,Shawn Zarraga