Jason Giambi was activated before Friday night's game from a stint on the DL because of a strained left quadriceps. Giambi was batting .260 with 10 home runs and 24 RBIs in 48 games as the backup first baseman behind Todd Helton. He was not in the lineup and manager Jim Tracy said Giambi would resume his role as a left-handed bat off the bench.
"Here and there when Todd needs a break, you give him a chance to get a game and get some at-bats," Tracy said. "You can't overdo it with him at first base."
Street has 29 saves in 32 chances but has allowed runs in three of his four appearances this month along with one blown save. He's 1-3 with a 4.06 ERA.
Tracy said Rafael Betancourt would serve as stand-in closer. Betancourt earned his first save of the season on Tuesday at Cincinnati and has not allowed an earned run since July 7.
Tracy said Betancourt was a better option right now than rookie left-hander Rex Brothers, the Rockies' first-round draft pick in 2009. Brothers was 1-2 with a 4.38 ERA with 35 strikeouts in 24 2-3 innings.
"I don't think that's the right path to take with Rex," Tracy said. "I also personally feel Rafael will do an adequate job under the situation and circumstances we've got."