Gregerson worked a scoreless eighth inning, allowing a hit and a walk, to set up closer Ken Giles in Monday's 3-0 win over the Mariners on Opening Day.

EDGE Analysis

When we last saw Gregerson, he was closing out games for Team USA in the World Baseball Classic, but he has returned to a setup role for the Astros. The right-hander converted 46 of 57 save opportunities (81 percent) the last two seasons and is manager A.J. Hinch's obvious first choice to fill in at closer should Giles become unavailable.