Tsao, savoring the taste of his first major-league victory, was more critical than his manager.
"I would rate myself in the 70th percentile today," Tsao told local reporters in a telephone interview. "You definitely can't make too many mistakes here in the big leagues, because the hitters here will make you pay every time."
The Rockies issued 40 extra media credentials, including 20 from Taiwanese media, and the game was televised in Taiwan. Several fans waived mini Taiwanese flags during the game and a group of Asian fans behind Colorado's dugout held up "K" signs each time Tsao struck out a batter -- five for the game.
Los Angeles outfielder Chen Chin-feng became the first Taiwanese player in the majors last September at Coors Field.
Wes Obermueller (0-1) allowed four runs -- three earned -- on five hits in six innings in his first appearance this season.
The Brewers opened a 10-game road trip with their seventh straight loss at Coors Field.
Marlins 11, Phillies 5
In Miami, Consecutive bases-loaded walks issued by Philadelphia relievers Mike Williams and Carlos Silva forced home the tying and go-ahead runs for Florida, which scored eight times in the eighth inning to beat the Phillies.
Florida drew five walks in the inning against Williams (1-4) and Silva to take the lead, then broke it open on consecutive run-scoring singles by Miguel Cabrera, Alex Gonzalez, Todd Hollandsworth and Juan Pierre.
Derrek Lee homered, doubled, singled and walked twice for Florida, which beat Philadelphia for the sixth straight time and moved within four games of the Phillies in the NL wild-card race.
Placido Polanco's three-run homer off Ugueth Urbina (1-0) gave Philadelphia a 4-3 lead in the seventh, but it was short-lived.
Giants 5, Padres 2
Pedro Feliz hit a three-run homer in the ninth inning for the second game-ending shot in two days by San Francisco, which won its ninth straight. Feliz started in left field in place of slugger Barry Bonds, who missed the game to be with his father, Bobby, who underwent open-heart surgery.
Bonds hit a game-ending homer Thursday and also made a run-saving throw to the plate on his 39th birthday.
Feliz came up with runners on second and third and one out and was mobbed at home plate by his teammates after hitting his 10th homer of the season on a 3-2 pitch from Jay Witasick (2-2).
Felix Rodriguez (6-0) pitched one inning for the victory.
Derek Jeter's sacrifice fly in the ninth inning gave New York a 4-3 victory over Boston on Friday night and moved the Yankees 3 1/2 games ahead of the Red Sox in the AL East.
Enrique Wilson led off the ninth with a single, stole second and advanced to third on a groundout before Jeter looped a fly to center field off Red Sox closer Kim Byung-hyun (3-3).
Mariano Rivera (5-0) gave up a one-out double to Nomar Garciaparra in the bottom of the ninth and walked Manny Ramirez, but struck out Kevin Millar and got Jeremy Giambi to line out to second base to seal the win.
Rivera, in relief of Armando Benitez, allowed Jason Varitek's bloop single that tied it at 3 in the eighth. The Yankees took a 3-2 lead on Bernie Williams' RBI single off Pedro Martinez in the seventh.
Martinez threw 128 pitches -- his most since May 1, 2001, when he threw 136 in eight innings against Seattle.
Martinez gave up seven hits and struck out 10 in 6 2-3 innings.