PHILADELPHIA - Jason Giambi became the second-oldest player to hit three homers in a game and tied his career high with seven RBIs, leading the Colorado Rockies past the Philadelphia Phillies 7-1 Thursday night.

Jhoulys Chacin was the beneficiary of Giambi's turn-back-the-clock power display. Chacin (5-2) allowed one run and four hits, striking out a season-high nine in seven innings.

Making a rare start at first base in place of Todd Helton, Giambi went deep in his first three at-bats. The 40-year-old former AL MVP entered 3 for 26 (.115) this season with one home run and four RBIs.

With two chances to match the major league record of four homers in a game, Giambi struck out looking against Scott Mathieson in the sixth and went down swinging against J.C. Romero in the ninth.