One of the most respected wide receivers in today's age retired Thursday. Jimmy Smith of the Jacksonville Jaguars retired, ending his 13-year career. Smith was very emotional when making the announcement.

"It's hard because I know I can still go out there and do it," Smith said. "I just figure it's not in my heart to (continue). If I'm going to play, it's got to be 100 percent. I won't get out there and not give it my all. ... This is just not the type of person that I am."

Last year, Smith still led the Jaguars with 70 receptions for 1,023 yards and six touchdowns, despite being 37 years old.

"I've been playing 37 years," he said. "It is time for me to retire. I'm tired, so leave it at that."

Smith ranks seventh all time in NFL history with 862 catches. He ranks 11th in receiving yards with 12,287. Smith was originally going to return for one more season, but then had a change of heart heading into training camp. Jaguars head coach Jack Del Rio told him to take his time in making his decision.

"It's best to leave on top. Not many players in the NFL get a chance to do what I'm doing today and walk away from the game happy. I can live the rest of my life happy," said Smith.

Smith joined the Jaguars in 1995, where he turned his career around under head coach Tom Coughlin. Smith could still probably play for years with the shape he's in, but he's made a decision to go out feeling good.