His right hip aching, his timing at the plate a mess, Rockies first baseman Todd Helton landed on the 15-day disabled list Friday. In a corresponding move, the Rockies promoted infielder Josh Rutledge from Double-A Tulsa to the 25-man roster.

Helton will undergo an MRI to discover what's causing the pain that has disrupted his leg kick at the plate and contributed to a prolonged slump.

Helton, 38, is hitting only .235 with seven home runs and 34 RBIs. He has an on-base percentage of .332. Helton's career batting average is .320 and his lifetime on-base percentage is .419.

The Rockies hoped Helton would improve during the all-star break, but he didn't.

"Because he was experiencing some soreness, we did shut him down for several days prior to trying it on Sunday — it wasn't very good," manager Jim Tracy said. "He came in today and he's still sore. Now there needs to be some intervention ... and we have to try to get to the very bottom of it."

In Helton's absence, Tyler Colvin and Michael Cuddyer will share playing time at first base. Cuddyer started there Friday night vs. the Phillies.