Boston College coach Jeff Hafley has chosen his starting quarterback for Saturday’s (noon) regional rivalry clash with Holy Cross at Alumni Stadium.

He’s just not saying who it is.

“We have made our decision on the quarterback and you will respectively see (who) when we kick off on Saturday,” said Hafley. “We know what our quarterbacks are going to do and we will continue to work that way in practice.”

Emmett Morehead was the incumbent atop the depth chart coming out of training based on his four ACC starts at the end of last season. Morehead’s stay at No. 1 ended after two possessions in last weekend’s 27-24 overtime loss to Northern Illinois in the home opener.

Morehead was replaced by dual threat sophomore Thomas Castellanos, a transfer from Central Florida. Castellanos played the remainder of the game and erased a 14-point deficit late in the fourth quarter to force overtime. Castellanos completed 13-of-28 passes for 138 yards, threw for two touchdowns and rushed for another.

“(The decision) was from conversations with the coaching staff and that was pretty much it,” said Hafley. “We had to figure it out and you practice the first time on Tuesday so we wanted to figure it out Monday.

“We sat down and talked about it Monday at length and we are full speed ahead.”

BC co-offensive coordinators Steve Shimko and Rob Chudzinski installed a new offense, but there is no one size fits all scheme that can accommodate two diverse quarterbacks.

Morehead is a 6-5, 235-pound pocket passer who can see over the line, make progressions, and deliver an accurate ball. Castellano is a 5-10, 198-pound dual threat, run pass option quarterback who can make plays with his feet and creates opportunities on the run.

The disparities in size and style between the two contending quarterbacks presents a game planning conundrum for Holy Cross head coach Bob Chesney, who has taken the Crusaders’ program to new heights in his six seasons.

“Here is the thing, we may not know who their quarterback is but there are also two really different offenses for each quarterback,” said Chesney. “They have two different quarterbacks that do two different things and there is going to be a lot on the staff and the players as we progress through this week.”

Chesney is fielding the strongest most experience team on his watch with 11 preseason All-Patriot League selections and five FCS preseason All-Americans, including QB Matt Sluka.