Asked on Friday if he was worried about the injury, Barton said: "Not at all. It's just a little minor thing. We're going to get through it now. Luckily it's only Spring Training."
Barton, 22, said earlier this week that the trainers had told him that repetition had caused soreness in the side of his left hand from taking too many swings with the bat so early in Spring Training.
The A's are counting heavily on Barton to blossom at first base this season as part of their youth movement. He played the 2007 season at Triple-A Sacramento, but was a Sept. 1 callup and started 18 games at first base for the A's, impressing many by batting .347 with nine doubles, four homers and eight RBIs.
He said the root of the injury was a swipe tag in a collision at first base last summer when he was still playing for the River Cats.
Barton hurt his hand this time around on Saturday and hasn't played since.
It's tough to feel too good about a start in which you allow five hits, walk two, hit a batter and toss two wild pitches, but left-hander Dana Eveland took the positive out of his three innings against the Giants on Friday.
"It's nice to walk away and give up only one [run]," said Eveland, one of six players obtained from Arizona late last year in the trade that sent Dan Haren to the D-backs.
The first inning was the key. Eveland said he had no control of his breaking pitches, and the Giants loaded the bases on a hit, a walk and a hit by pitch. But Aaron Rowand grounded into a double play to end it, and the Giants didn't score.
If this was another audition for the vacant fifth spot in the rotation, Eveland said he wasn't worried.
"That's the way I've been my whole career," he said. "If I throw well enough during Spring Training to make the team, I do. If I don't, then I've got to go back to Triple-A and get better again. Generally, if I put too much pressure on myself in the spring, it's just going to get ugly. That's been a factor in the past. I don't know what my numbers are in the spring, but I know they're not good."
His numbers this spring for two starts: two earned runs, nine hits, two walks, two strikeouts, three wild pitches and a 3.60 ERA.
This and that:
Right-handed reliever Kiko Calero pitched off the mound for the first time this spring on Friday. Calero has been nursing a non-surgically repaired rotator cuff injury in his right shoulder. ... Right-hander Keith Foulke, whose wife gave birth to a boy early Friday morning, threw his second simulated game of the spring and told reporters afterward that he used all his pitches and is coming along. Foulke sat out last season after leaving Indians spring camp because of assorted injuries. ... The A's announced more roster cuts on Friday, sending out three players, making it eight in two days. The latest group: Outfielders Javier Herera and Richie Robnett were optioned to Sacramento, and non-roster invitee outfielder Danny Putnam was reassigned to the Minor League camp. That leaves a total of 53 players in the Major League camp, 37 on the 40-man roster and 16 non-roster invitees. That includes 25 pitchers, 14 infielders, nine outfielders and five catchers.
The A's have split-squad games in Phoenix against the Cubs and at Peoria against the Mariners on Saturday. At Phoenix, right-hander Rich Harden will get his second start of the spring at Phoenix Muni against Cubs right-hander Jon Leiber. At Peoria, right-hander Justin Duchscherer will be making his first start and second appearance of the spring against left-hander Jarrod Washburn.