The Indianapolis Colts' left tackle Anthony Castonzo suffered an MCL sprain early in the Browns game on Saturday.A lot of Colts fans were holding their breaths Saturday night as they watched left tackle Anthony Castonzo lay on the ground in some pain. He was able ot walk on the field and his knee didn't seem horrible, but you never know these days. Many worried about him missing an extended amount of time. The news came back yesterday and you can breath now.The kid's going to be alright! His MCL sprain isn't serious and should be back for the regular season. Castonzo said that he will be back for Week 1. He will not play in the preseason finale against the Cincinnati Bengals, a game that usually features the backups and reserves and will not see many starters at all. It's good rest for Castonzo.While Castonzo was out, Joe Reitz came in and did an admirable job against the Browns. He was able to seal off the rushers and not allow pressures. He did a solid job and proved to be a good backup; this probably saved his job as well.So, to recap, the Colts have good depth at tackle and Anthony Castonzo will be just fine.