Who Will be the Chargers New Offensive Coordinator?

Jan 12, 2014; Denver, CO, USA; San Diego Chargers head coach Mike McCoy before the game against the Denver Broncos during the 2013 AFC divisional playoff football game at Sports Authority Field at Mile High. Mandatory Credit: Ron Chenoy-USA TODAY Sports
The Chargers former offensive coordinator, Ken Whisenhunt, took a head coaching gig with the Tennessee Titans and the Chargers now are on the hunt for a new coordinator to call the plays on offense. Who will Mike McCoy want to put in place for the new job?
Current quarterbacks coach, Frank Reich, has been mentioned as the top candidate to take the job. He has been influential in helping Philip Rivers this season.
He has been in coaching since 2008, where he started as the offensive coaching staff assistant with the Indianapolis Colts. He then became the quarterbacks coach in 2009 and then flipped to become the wide receivers coach in 2011. He was let go with the rest of that Colts coaching staff after that season and then became the wide receivers coach with the Arizona Cardinals under Ken Whisenhunt last year. They were all let go after the season and he joined Whisenhunt on the Chargers staff this year. He doesn’t have any playcalling experience, but has spent plenty of time coaching. Who knows what kind of playcaller he would be.
As a player, Reich was known for the biggest comeback in playoff history. The Bills trailed 38-3, and he led the team back to a 41-38 win. He played in the Buffalo Bills K-Gun offense and could bring some of that offense over to San Diego.
If Frank Reich is not the offensive coodinator, there is another offensive mind that is already on the staff that has called plays in the past.
Mike McCoy.
Could Mike take the playcalling responsibilities back? He knew that Whisenhunt likely was a one season rental and that could give him some time to get comfortable as the head coach. He then could take back the responsibility of calling the plays this season. Is that what he ultimately wants to do?
We will have to see if the Chargers bring in some coaches for interviews. Frank Reich has been the only name mentioned at the moment and he makes a lot of sense.
Coach McCoy says that he has a list of candidates and we will know when he makes those decisions. As always, we will never know anything unless Coach McCoy decides to tell us.