DENVER -- The San Diego Padres spoiled the start of Colorado's first extended homestand of the season and the return of Jorge De La Rosa by pounding the Rockies 14-3 Monday.

The Padres packed their scoring into three big innings and did most of their damage early. They jumped on De La Rosa, the Rockies' top starter, for five runs in the first and four more in the second for a 9-0 lead. De La Rosa pitched three innings and tied his career high by giving up nine runs (seven earned).

San Diego piled up 17 hits, including three each by right fielder Matt Kemp, who had four RBIs, and catcher Brad Norris. First baseman Yonder Alonso drove in three runs. Third baseman Will Middlebrooks hit a two-triple in the second, and left fielder Will Venable hit a two-run homer to cap the Padres' five-run fifth.

The first three batters in the Padres' lineup, center fielder Wil Myers, Norris and Kemp, each scored three runs.

De La Rosa, who began the season on the disabled list with a left groin strain, was activated Monday. He had the necessary rest to pitch Sunday at Dodger Stadium, but manager Walt Weiss opted to wait another day and start De La Rosa at Coors Field, where he has been extraordinarily successful.

De La Rosa (0-1) took the mound with a 45-14 career mark at Coors Field, including 10-2 with a 3.08 ERA last season. De La Rosa yielded six hits in the Padres' first-inning onslaught. The Padres last scored five runs in the first at Cincinnati on July 29, 2009.

The Padres (9-5) earned their fifth win in six games, while the Rockies (7-6) lost their fourth straight. Colorado began a seven-game homestand. The Rockies played three home games against the Cubs from April 10-12 surrounded by nine games on the road.

Odrisamer Despaigne (2-0) made his Coors Field debut and held the Rockies to two runs and six hits in 6 2/3 innings.

NOTES: Rockies RHP Scott Oberg was optioned to Triple-A Albuquerque to make room on the roster for LHP Jorge De La Rosa, who was activated from the disabled list after recovering from a left groin strain. ... Rockies 3B Nolan Arenado was scratched from the lineup due to a sore left wrist and is listed day-to-day. He started the Rockies' previous 12 games and played all but one inning of those games. ... Padres RHP Ian Kennedy (left hamstring strain) threw 81 pitches in six innings in an extended spring training game in Peoria, Ariz. He will be re-evaluated Tuesday when he rejoins the Padres. Kennedy is eligible to come off the disabled list Saturday. ... Padres LF Justin Upton was back in the lineup and went 1-for-3. He strained his left quadriceps Saturday and didn't play the following day.