Blach looks like he's won an Opening Day roster spot, Thomas Harding of MLB.com reports.
Blach is in camp as a non-roster invitee, so the Rockies will have to clear a spot on the 40-man roster to add him. The 31-year-old lefty owns a 4.99 ERA in 326.1 career major-league innings, striking out just 12.7 percent of opposing batters. He missed the last two seasons while recovering from Tommy John surgery.