Cardinals selected the contract of LHP Quinn Mathews from Triple-A Memphis.

Mathews will make his major-league debut against the Blue Jays on Saturday at the Rogers Centre. The 25-year-old southpaw was widely regarded as one of baseball’s most exciting pitching prospects entering last season before a shoulder injury, compounded by mechanical issues that wreaked havoc on his command, completely derailed his development. The result was nearly 50 Triple-A starts over the past two seasons instead of a prolonged opportunity in the majors. He still misses bats at an impressive clip, keeping him firmly on the fantasy radar, but his inability to consistently throw strikes amplifies the risk more than most pitching prospects. He’s a fascinating talent, but forecasting his future is extremely challenging. He’s certainly not a fit for risk-averse fantasy managers.