The Bulls swept the Governors Cup Finals, tying the Yankees then pulling ahead in the 12th inning to win 3-2.
Yankees' starting pitcher Ivan Nova pitched through seven innings and held the Bulls scorless. He walked the first batter he faced in the eighth inning and allowed a single before being relieved by Zach Kroenke.
Until then, the Yankees had a comfortable 2-0 lead through four innings, both RBI by Cody Ransom -- one in the second on a sac fly that scored Juan Miranda, who tripled, and another in the third on a single to score Austin Jackson.
"It would've been nice to get a run across tonight, but we didn't get that big hit," said Yankees manager Dave Miley. "Nothing to be ashamed of.
"We were not able to finish it off, and that gets magnified in an extra-innings game."
The Yankees stranded 15 runners, including two on the game-ending groundout, and went 1-for-11 with runners in scoring position.
Eric Wordekemper put a Bull on base in the 12th, who scored on the next batter's double to cap the scoring -- the only run he allowed through two innings.
Kevin Whelan pitched 1.2 scoreless innings and had three walks and three strikeouts.
"These guys should be proud," Miley said. "We've had a hell of a season. We were only two of 14 teams to get to this point. We battled all summer, regardless of who was in the clubhouse."
"We'll start again in the spring."
This story was not subject to the approval of the National Association of Professional Baseball Leagues or its clubs.