Thin bullpen kept Tommy Kahnle on mound

Tommy Kahnle #54 of the Colorado Rockies pitches in the ninth inning against the San Francisco Giants at AT&T Park on June 26, 2015 in San Francisco, California. (Lachlan Cunningham, Getty Images)SAN FRANCISCO — The domino effect of Adam Ottavino's season-ending Tommy John surgery continues to needle at the Rockies' bullpen.

Friday against the Giants, in the opener of a 10-game road trip, manager Walt Weiss called on 25-year-old Tommy Kahnle.

Kahnle started warming up down the right-field line in the eighth inning, preparing for the first save opportunity of his career.

The Rockies busted loose for two more runs to ruin the save chance. Kahnle gave up three runs and struck out two as Colorado…