Coach

Coach is one of the four playable survivors in Left 4 Dead 2. Coach was a high-school football instructor for a well playing team, but he suffered a nasty knee injury. Ironically, he's now a health teacher pushing 40 years old, but he's gone to seed since his collegiate glory days. The zombie apocalypse makes him wish he'd watched his own fitness more closely. Faliszek says Coach has "a great hatred for a few of the zombies—the Witch in particular," but naturally, he wouldn't explain why.

Quotes
"See: Coach/Quotes"

Trivia

 * Coach can be related to the character Uncle Phil from the TV show The Fresh Prince of Bel-Air.
 * Coach appears to have a slight speech impediment, occasionally dropping his R's and G's. This is probably due to Southern dialect.
 * He may also be somewhat religious as he usually makes comments referring to the Bible and stating the last time he saw his grandmother, she asked if he was still a praying man.
 * Bill and Coach have many things in common. According to their back-stories, both Bill and Coach have knee injuries. They also are the oldest in their group, and have a dislike for climbing stairs. On top of that, they both have a different physical disadvantage. Bill's disadvantage is that he's older than anyone out of the two groups. On the other hand, Coach's disadvantage is that he is overweight, preventing him doing similar things to Bill. (Note how Bill is quite healthy for his age). Also, Bill and Coach both share a great hatred for (and possibly past experiences with) The Witch.
 * "Though I walk through the valley of the shadow of death" is a quote from the Bible, Psalms 23:4.
 * In an issue of PC Gamer, the original concepts of the Coach can be seen, including a skinny coach, a white coach, and a coach in football shoulder pads used as armor. He also holds a bow and arrows (depicted in the gallery below).
 * Coach appears to hold a pistol with only one hand when his health is lower than 40 HP.
 * It seems from the new trailer he highly enjoys chocolate, as he is seen eating a bar of it and Nick teases him with the idea of a chocolate helicopter to lead him up stairs quickly. This may also relate him to Bill as in having a chocolate addiction much like Bill's tobacco addiction (whom is never seen not smoking.)
 * Coach's shirt has the abbreviation "FHS," which could mean that the school at which he coaches could have a name that starts with an 'F' (F... High School).
 * If Coach teaches at a Geogia based Highschool, the 'F' Could stand for one of Georgia's Forsyth County High Schools. However, there are four district branches (North, South, West and Forsyth Central) have a proceeding letter in their acronyms.It should also be noted that Purple and Yellow/Gold do not match any of the listed schools