Despite a bruised left big toe, right-hander Jhoulys Chacin will start Saturday afternoon’s Cactus League game at the Oakland A’s. However, center fielder Dexter Fowler will miss his second straight game because of a sore right ankle. “No use rushing back, I want to make sure it’s strong for the season,” Fowler said, noting that he rolled his ankle three times during the 2012 regular season. Though the ankle is taped, Fowler insists the injury is not a big deal. Chacin’s start will be his final one with the Rockies before he joins Venezuela to compete in the World Baseball Classic. Also scheduled to pitch today are Matt Belisle and Parker Frazier. Veteran first baseman Todd Helton told me Friday that he would make his Cactus League debut Saturday. It turns out he won’t play until Sunday when the Rockies host the A’s at Salt River Fields. “I just looked at the calendar wrong,” Helton said. “I knew it was the A’s, I just got the day wrong.”