Red Sox starting pitcher Clay Buchholz is on schedule to make his first start off the disabled list on Tuesday. But that could all change. “We’re hopeful he’ll be on the mound here in the next day or two,” Boston manager John Farrell said prior to Thursday’s game at Comerica Park against the Detroit Tigers. “We’ll need him to in advance of Tuesday. “The ideal scenario will be for him to get an extended bullpen that will have some ups and downs in it,” Farrell continued. “At this point, we’re still scheduled to have him on Tuesday, but we’ve got to get through some specific work sessions over the next couple of days to remain consistent with him.” Buchholz was placed on the 15-day DL, retroactive to June 9, after suffering a strained trapezius muscle in his neck. He can come off the DL on June 25, when the Red Sox host the Colorado Rockies at Fenway Park. On Thursday, Buchholz threw from about 100 feet on flat ground, according to Farrell. “We’re approaching the two-week mark where he hasn’t been in a game,” Farrell said. “Ideally he’ll get close to three (innings), which would be about a 45-pitch bullpen. That would be the target.” His bullpen session is scheduled for Saturday. If Buchholz suffers any setback along the way, a trip to the minors may be in store.