The tenth of our 32-team series for Yahoo! SportsAfter taking over for Jeff Fisher following a disappointing 2010 season, new Tennessee Titans head coach Mike Munchak led his team to a 9-7 finish and just missed making the playoffs.But for those looking for bigger and better things in 2012, it simply was not meant to be. Instead of challenging the Houston Texans for the top spot in the AFC South, the Titans stumbled to a 1-4 start (all four setbacks by 21 or more points) and digressed back to 6-10. Perhaps even more bothersome was the fact that the Titans were a mere 1-5 vs. divisional opponents in 2012.But onto 2013 and here we will take a look at five players who could be critical to the team's success this upcoming season. While in some cases the obvious will be stated, in other instances the focus will be on a newcomer to the team or a performer looking to rebound from a disappointing year.So here are five players to keep an eye on this season when it comes to the Tennessee Titans: