OAKLAND -- The next step in Brett Anderson's potential return to the A's roster will be another bullpen session -- his fourth in nine days -- on Tuesday.
The left-hander will throw 25 pitches before taking a break and then hitters will step into the batter's box to simulate a simulated game.
And if all goes well, the next step could "potentially" be for Anderson to throw an actual simulated game.
Asked if the mid-August return to the A's as still a possibility, Oakland manager Bob Melvin blanched.
"I'd hate to put a timeline on it," Melvin said, adding that until Anderson throws his first rehab game, then the A's would have a better timetable on his return.
Anderson, who had a sprained right ankle and stress foot fracture and has not played since April 29, has had three bullpen sessions…a 35-pitch workout last Monday in Houston, a 40-pitch session on Wednesday and Saturday's 51-pitch up-and-down bullpen.
The concussed John Jaso, who took a few too many hard foul tips off the facemask this past week in Houston, said Sunday morning he was so nauseous from the concussion symptoms that he was "dry-heaving" during the last game of that series, on Wednesday,
Jaso also said it is the third time he has suffered a concussion, along with the ones he had in 2010 and 2005, though he added that he is feeling better. Even if his activity is limited.
"All the fun stuff is cut out," he said. "No reading. No TV. No video games…anything that's visually stimulating.
"Sleeping is good."
Jaso, who is batting .271 with three him runs and 21 RBI with an on-base percentage of .387 in 70 games, was placed on the 7-day disabled list Thursday. And if he is not activated within 14 days, he must be transferred to the 15-day DL.
"He's not doing any (baseball) activity," Melvin said. "Until he starts doing anything, it's status quo."
Jaso said he has taken what is akin to the NFL's baseline test, calling it an "impact test" to measure his reaction time and memory to compare to what the figures were before the concussion.
He said he felt a headache coming on under the lights in Houston and became "disoriented."
Jaso wears at the traditional catcher's mask, rather than the hockey-style helmet. He said because the traditional mask flies off on a foul tip, it takes away the force of the blow, as opposed to the hockey helmet, which, he said, absorbs it.
Earlier on Sunday, the Angels placed Albert Pujols on the 15-day DL due to a partially torn plantar fascia. The injury could cause Pujols to miss the rest of the season, according to reports.