Originally written on Fox Sports  |  Last updated 1/25/12

JACKSONVILLE, FL - 2009: Terrance Knighton of the Jacksonville Jaguars poses for his 2009 NFL headshot at photo day in Jacksonville, Florida. (Photo by NFL Photos)
Jacksonville Jaguars defensive tackle Terrance Knighton's NFL career is at a crossroads -- and his defensive coordinator isn't afraid to admit it. Speaking with me and co-host Jim Miller on Sirius XM NFL Radio, Mel Tucker addressed the weight problems that caused regression in a third-year player who was emerging as one of the league's top young interior linemen. The 6-foot-3 Knighton was well above his listed weight of 336 pounds last season, which greatly affected his productivity and stamina. "I'm not going to tell you anything I haven't told Terrance. He knows this is put-up-or-shut-up time right now," Tucker said Tuesday night from the Senior Bowl. "He knows he can be a dominant player if he keeps his weight under control. Now is the perfect time to get that right. "He knows that, 'If I'm going to be the player I need to be and can be and have the respect of my teammates and coaches, there are certain things I have to do on and off the field.' Weight management is one of tho...
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