Make what you will of this: Of the four members of the Dolphins organization most identified with the franchise’s past four seasons, general manager Jeff Ireland will be the only one actively doing his job come Sunday’s season finale against the Jets.

Director of football operations Bill Parcells began emptying his office before the 2010 season. Tony Sparano got relieved of the coach job two weeks ago. And left tackle Jake Long, the regime’s first draft pick, No. 1 overall in the 2008 draft that perhaps dictated the course of the franchise, might be out until the start of the 2012 season with a torn biceps injury.

Long came out of Saturday’s loss to New England with an arm injury, which ESPN first reported was a torn bicep. Dolphins interim coach Todd Bowles didn’t really dispute that Monday when asked if that was Long’s injury.

“We’re still running the tests,” Bowles said. “I’m hearing rumors that he did, but we won’t know anything until Wednesday. Honestly, we were off [Sunday].”

It’s been a rough last season and a half for Long, who was ranked as the league’s 28th-best player in an NFL Network players’ poll a year ago.

He finished the 2010 season with a shoulder injury that at times almost removed the use of one lengthy arm, a key in pass protection.

Various injuries hampered him throughout the preseason, and back problems have caused him to miss the first two games of his career this season.

John Jerry, a guard by trade, handled the left tackle spot against Buffalo on Dec. 18 and Saturday after Long left the game.

“I think John did an adequate job,” Bowles said. “You always miss a presence like Jake. There’s not a big drop-off there with John. We did some things. We ran the ball well. Just thought those guys in the second half on the other side made the plays that we made in the first half.”

While the offensive line jumbles haven’t been a detriment to the running game — the Dolphins are ninth in rushing, and Reggie Bush ran for his 203 yards against Buffalo with Long out — the pass protection could be charitably described as “porous.”

Granted, pass protection includes tight ends chipping or kept in to block, blitz pickups by tight ends or backs and the quarterback not holding the ball like it’s a winning Powerball ticket.

But 51 sacks allowed overall, one short of tying the franchise record set in 2004, and a league-worst ranking in sacks per pass play allowed, starts with the offensive line.

“You’ve got to throw the ball in this league,” Bowles said. “You just can’t win with running the football. We’re not worried about the sack record or anything. We’re worried about protecting the quarterback. So from that standpoint, we just have to do a better job of keeping [quarterback] Matt [Moore] upright in the pocket.”