It was CarGo T-shirt day at Coors Field, and fans were waving their purple shirts with gusto in the fifth inning Saturday.

That's when Carlos Gonzalez, the hottest hitter in baseball, strode to the plate to face Dodgers starter Aaron Harang with one out, the bases full and the Rockies trailing 4-1.

Considering the Roy Hobbs impersonation Gonzalez has been pulling off lately, a big hit, maybe even a grand slam, didn't seem improbable.

Alas, CarGo proved he was a mere mortal, popping out to Dodgers third baseman Elian Herrera in foul territory. And when Michael Cuddyer grounded out to end the inning, the Rockies were on their way to a 6-2 loss that ended their five-game winning streak.

The Rockies also lost starting pitcher Juan Nicasio when the right-hander twisted his left knee in the second inning. The Rockies are calling the injury a strained knee, and manager Jim Tracy said the club would know more today.

However, it seems unlikely Nicasio would be ready to pitch Friday, his next scheduled start. But with an off day Thursday, the Rockies have some flexibility with their rotation.

"I know I want to pitch again. I will try to make my next start," said Nicasio, who had trouble putting weight on his left leg in the clubhouse after the game. "I don't have any balance."