TORONTO — Left-hander Brandon Barriera, the Blue Jays’ No. 4 overall prospect, underwent a combination Tommy John surgery and internal brace procedure on his throwing elbow, the club confirmed. The procedure addressed a Grade 2 UCL tear, said Barriera’s agent, Nate Heisler, on social media. The Blue Jays expect Barriera to be sidelined for the rest of the year at least. “Really …