The Colorado Rockies are hoping the right-hander doesn't miss a beat when he returns to their rotation Saturday against the Philadelphia Phillies.Following a rough first start for Colorado (35-33), Chatwood (3-1, 2.14 ERA) is 3-1 with a 1.30 ERA, while racking up 27 strikeouts against just seven walks. He was having another solid outing in Cincinnati on June 3, before feeling pain in his triceps on a pitch to Shin-Soo Choo in the third inning. The pain bothered him whenever he threw a fastball, forcing him to leave after four innings of one-run ball in a 3-0 loss.An MRI showed no serious problem, however, allowing the Rockies to plan for a quick return."Very, very good news on Chat," manager Walt Weiss said on June 5. "They just saw a little inflammation in there, nothing major."He'll face a Philadelphia offense that finally broke through in Friday's series opener, pounding out 13 hits and rallying for an 8-7 victory. The Phillies (33-35), who had plated 21 runs in the first seven contests of a 10-game road trip, trailed 7-2 after five innings before mounting their biggest comeback of the season."This is a park where the ball flies," said Freddy Galvis, who hit a pair of 2-run triples and scored the go-ahead run on Humberto Quintero's single in the seventh inning. "You've just got to keep hitting and we got 'em."Jonathan Pettibone (3-2, 3.70) can only hope such abundance carries into his start. The right-hander has received just five runs of support over his last five starts, and not surprisingly, hasn't won since May 14.In his first career start at Coors Field, hardly a pitcher-friendly venue, Pettibone will look to put his road woes behind him. He has a 5.32 ERA in four starts away from Philadelphia.Pettibone struggled his last time out, surrendering a season-high six runs in a 9-1 loss at Milwaukee on Sunday. He gave up just four hits but was undone by two walks and two hit batsmen.Pettibone will face an explosive Colorado offense that erupted for double-digit hits for the sixth time in nine games Friday. The Rockies lead the majors with 48 home runs at home and are tied for second with their .282 batting average.Josh Rutledge and Carlos Gonzalez each homered Friday for Colorado, which fell to 24-3 when plating at least six runs.For Philadelphia, center fielder Ben Revere dropped off his torrid pace. After recording seven hits in his final 10 at-bats in Minneapolis, he went 1 for 5 Friday.First baseman Ryan Howard went 0 for 3 with two walks, and still has just one home run with 40 strikeouts in 109 at-bats since May 8.Galvis, who arrived in Denver mired in a 1-for-20 slump, spoke for an entire lineup after lifting the Phillies to consecutive wins following a season-high five-game skid."Hopefully, I'll keep swinging good and help the team," Galvis said. "Sometimes, that's the kind of game you need to get back on track."