FORT MYERS, FLA. - Jason Bartlett thought he was in a three-way battle for the Twins starting shortstop job this spring.

He wasn't counting Trevor Plouffe.

But in a moment only spring training can provide, the 19-year-old Plouffe staged a one-man coup Friday, stealing Bartlett's spot during a 3-1 victory over the New York Yankees.

The Twins had invited Plouffe (pronounced ploof) to spend a game with the big league squad, rewarding the promising 2004 first-round draft pick who has yet to climb above Class A.

In the sixth inning, bench coach Steve Liddle told him to be ready. Plouffe apparently took that to mean he was going in immediately. When the inning ended, Bartlett was supposed to remain at shortstop, but the kid was already in his spot, taking ground balls.

"He just ran out to shortstop!" Twins manager Ron Gardenhire said, laughing hysterically afterward. "He took [Bartlett] out! He just went in! ... That's why you never know what might happen in this game. You turn your back for one second, you've got a whole new team out there."

Bartlett had a good chuckle, too, even though it cost him an at-bat. He was 1-for-2, singling and grounding out against All-Star lefthander Randy Johnson.

Plouffe took his turn in the seventh inning, popping out against Yankees minor leaguer Jose Enger Veras.

"You can do whatever you want when you're a first-rounder, I guess," Bartlett said, smiling. "He wants at-bats, so he goes out and gets one without even asking."

Bartlett's easygoing manner could be viewed as a sign of his confidence, even though Gardenhire has yet to anoint him over Nick Punto and Juan Castro for the starting job.

Bartlett, 26, quietly passed an important test Friday. Two nights earlier, he turned in a shaky performance against Cincinnati, dropping a routine popup and taking a third strike that ended the game.

After sitting out while Punto played Thursday, Bartlett faced the unenviable task of facing the 6-10 Johnson.

This wasn't a watered-down version of Johnson, either. The 42-year-old lefthander held the Twins to one run on five hits in six1/3 innings.

Bartlett had two of the better at-bats of the day against Johnson and made all the plays in the field. For the spring, he's batting .387, while Punto's average has slipped to .310.

Castro has been out since injuring his right wrist in the World Baseball Classic, but he had a double during a minor league game Friday and looked ready to return soon.

Gardenhire seemed pleased with the way Bartlett responded from Wednesday night's performance, but he wasn't about to let the ribbing end.

Asked if he was ready to name his starting shortstop, Gardenhire quipped, "Plouffe. ... He took over."

Kubel update

With lingering uncertainty over whether Michael Cuddyer (strained oblique) and Ruben Sierra (strained quad) will be ready to start the season, Gardenhire mentioned the possibility of right fielder Jason Kubel making the club in a platoon roll.

In that scenario, Kubel, coming back from knee surgery, would probably get starts against righthanders, with Lew Ford starting against lefties. If Kubel took over, he would probably play every day, Gardenhire said.

Etc.

• Carlos Silva had a better start than he had Sunday against Tampa Bay, holding the Yankees to one run on three hits in four innings. He threw only 50 pitches, remaining behind the other starters after pitching in relief during the WBC.