OAKLAND, Calif. -- Josh Donaldson never had a game-ending hit in one of Oakland's major league-high 14 walkoff wins last year.
His opposite-field home run with one out in the 12th inning Friday night extended the Athletics' winning streak to nine games with a 4-3 victory over the Detroit Tigers in a rematch of their playoff series last fall.
Donaldson's drive to right off Brayan Villarreal (0-2) was his first career game-ending hit.
"It was fun. This team has a bunch of great guys here and lots of players with the capability to win games," Donaldson said. "I never had a walkoff last year. Obviously it's special for me this year."
And in typical fashion for the reigning AL West champions, Josh Reddick found Donaldson with a pair of celebratory whipped cream pies -- a scene reminiscent of those 14 walk-off wins last year.
Prince Fielder homered and had four hits for the Tigers, who beat Oakland in a five-game AL division series last season on their way to the World Series.
The A's improved to an AL-best 9-2, just the third time in Oakland history the club has opened at least 9-2, also done in 1981 (11-0) and 1990 (9-2).
Only the Atlanta Braves at 9-1 have a better record than Oakland.
"We're trying to go out there and win a lot of games right now," Donaldson said.
Fielder hit a three-run shot and Max Scherzer struck out 11, but the Tigers didn't get enough from the bottom of their batting order. The last five hitters went a combined 2 for 25.
Reddick, Oakland's right fielder, received his Gold Glove before the game, and showed it off with a leaping catch of Victor Martinez's deep fly to start the ninth.
Coco Crisp hit a tying, broken-bat single in the seventh but was replaced in the field in the top of the 10th after straining his left groin.
Fielder connected for his third home run with a drive to center in the third. He singled in the first and led off the sixth with a double, then singled again in the 11th. Fielder had two four-hit games last season.
Oakland hasn't lost since dropping its first two games of the year at home to Seattle.
The A's, coming off a 6-0 road trip through Houston and Anaheim, accomplished the 14th winning streak of nine games or more in Oakland history. They also have the second-longest winning streak in Oakland history during the month of April.
Tigers catcher Alex Avila was hit in the helmet on a backswing when Brandon Moss struck out in the eighth but stayed in the game after being examined. Moss was called for interference on the play and Yoenis Cespedes had to return to first.
Cespedes was then picked off for the third out, and landed hard on his left hand after a tumbling slide on the play. He was removed in the 11th, and X-rays on his hand were negative.
"We'll see how he is tomorrow," manager Bob Melvin said.
Arriving in California was a relief for the Tigers, who were coming off an 11-1 victory at home over the Blue Jays in which the first-pitch temperature was 35 degrees and the wind chill took it down to 26. Friday's temperature: 59 degrees.
"That's the proudest I've been of a team on any particular day I've ever managed," manager Jim Leyland said Friday. "Weather conditions were as bad as I've ever played in, managed in, or right up there with the all-time worst."
On Saturday afternoon, Tigers ace Justin Verlander faces lefty Brett Anderson. Verlander won the deciding Game 5 in Oakland last fall and the Tigers went on to sweep the Yankees in the AL championship series before getting swept by San Francisco in the World Series.
Reddick hit an RBI single in the sixth to pull his team to 3-2. Scherzer struck out the next three batters on 11 pitches.
Bartolo Colon struck out five and didn't walk a batter in seven innings while making his first home start since being suspended 50 games last Aug. 22 for a positive testosterone test.
Colon is 0-7 over his last 13 appearances and 12 starts against Detroit and hasn't beaten the Tigers since April 13, 2003.
Scherzer struck out the side in the sixth, his final inning. He allowed two runs and five hits with one walk.
"They caught up and finally won with a home run. We've got no complaints about that," Leyland said.
Crisp extended his hitting streak to nine games with a first-inning bunt single, then stole his third and fourth bases of the year.
Former Tigers closer Jose Valverde, who agreed to a minor league deal with Detroit last week, pitched one scoreless inning at extended spring training in Lakeland, Fla., against the Braves. He struck out one and walked one. ... The Tigers were one of only two AL clubs the A's had losing records against last year, dropping the season series 4-3. Oakland lost the series with Kansas City 5-4. ... Oakland had eight hits, the first time in nine games the A's didn't get 10 or more.