Outfielder Tyler Colvin's play has forced the Rockies to sit Todd Helton more than usual, but it's been worth it. Colvin has homered four times in the last five games, with eight RBIs. "I try to stay the same, not getting really excited, not getting really mad," Colvin said. "That's what makes really good players really good." Nationals: The heat is on
After dealing with record heat in Denver and Atlanta, Washington D.C. has provided little respite for the Nationals. The high Saturday was 105 degrees, and it's expected to be 99 on Sunday, when the Nationals play their second straight day game. "I hear it's leaving us on Monday and we're taking a break," Nationals manager Davey Johnson said. "I hope it stays gone. I don't mind it, but I know how hard it is sometimes playing in it." Worth noting
Rockies pitcher Jhoulys Chacin will throw a two-part bullpen session on Thursday, when the Rockies have an optional workout at Coors Field. The righty was 0-3 with a 7.30 ERA before going on the disabled list with nerve damage in the right side of his chest. Nationals shortstop Ian Desmond, who started on Saturday and went 2-for-3 with a homer, has been replaced on the National League roster by Atlanta outfielder Michael Bourn. Desmond suffered a left oblique strain, for which he has undergone treatment and rest has been recommended. The Nationals have won 11 of their last 17 for a season-high 16 games over .500.