Carltons Andrew Walker has declared Sundays AFL clash with St Kilda his last.The well-loved Blue will retire a one-club but multiple-position player after 13 seasons with Carlton.Flanked by his two sons, Walker said on Tuesday hed lost a battle with his body to play on until the end of his contract in 2017.Its been an incredible 13 years, he said.Ive had a few downs with a few injuries which is probably why Im sitting here today.Due to a few more injuries I just cant do my job any more and Im finding it really hard to get up every week to play AFL footy.Walker, who said hed been playing partly injured for three years, informed his teammates of his decision on Monday night.Earlier this year, Walker became the first indigenous Carlton player to reach 200 games.He will finish with 202 under five different coaches - Denis Pagan, Brett Ratten, Mick Malthouse, John Barker and Brendon Bolton.Walker, originally from the Victorian town of Echuca, produced the spectacular time and again throughout his career.Two moments against St Kilda - the team he will finish his career against - showed his winning edge and his capacity to produce something special.He kicked a goal with a minute left on the clock in 2011 to earn Carlton a three-point win over the Saints.Two years later, Walker kicked an all-time classic goal against the same team, gathering the ball on half-back, bouncing four times before firing home from outside 50.Nominations for goal of the year and mark of the year came naturally to Walker, who will hope to produce a similar slice of magic in his farewell on Sunday.The 30-year-old said he was leaving the club in a good place.Our game plan is really solid and the kids are learning really quickly, he said.Its made my job a lot easier, leaving knowing these kids are developing in the right way.Carlton football chief Andrew McKay said Walker set the bar high for the next generation of players.Andrew had a frustrating run of injuries across the course of his career but admirably, he always put the teams needs first, he said.He also drove high standards and had a very strong work ethic which set a great example to the clubs younger players during his time.Hakeem Butler Jersey . 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Collaros also started Torontos 23-20 regular-season finale loss to Montreal — Ray didnt dress because the Argos had already clinched first in the East Division — but was one of three quarterbacks to play that day.STARKVILLE, Miss. -- Preseason camp wasnt kind to Mississippi States veteran cornerbacks.In the span of a few days, the Bulldogs lost senior Tolando Cleveland to a torn ACL in his left knee and senior Cedric Jiles to a broken right arm. Cleveland is out for the season while Jiles is likely out at least half the year.That means some young players are going to get a bigger-than-expected opportunity in Mississippi States season opener against South Alabama on Saturday.If Bulldogs coach Dan Mullen is concerned about the inexperience at cornerback, he hasnt shown it.Theres the opportunity, and you need to take advantage of your opportunity, Mullen said. Guys work hard in our program. We like to play a lot of players.Junior Jamoral Graham is among those who Mississippi State needs to improve in a hurry. Graham came to Mississippi State as a receiver but converted to defense last season and made 21 tackles.Junior college transfer Lashard Durr is listed as the other starter at cornerback while redshirt freshman Chris Stamps and sophomore Chris Rayford are the primary backups.Senior defensive end A.J. Jefferson said the losses in the secondary make putting pressure on the quarterback even more important. If the quarterback has less time to throw, the cornerbacks dont have to defend for as long.At the end of the day its going to make us better, Jefferson said. Were going to be out there trying harder and harder because in the back of our mind, we know theres a bunch of guys down in the secondary. Im sure all of them can hold their own, but we just want to make it as easy as we can for them.---Some things to watch in Mississippi States opener against South Alabama:MSSU TRIES TO FIND A QB: Mullen said hell use at least two quarterbacks in the season opener -- sophomore Nick Fitzgerald and junior Damian Williams.dddddddddddd Fitzgerald was Dak Prescotts primary backup last season and completed 11 of 14 passes while Williams made one start in 2013 as a true freshman. Depending on how the game goes, the Bulldogs could also use redshirt freshman Nick Tiano.SOUTH ALABAMA DEBUTS NEW QB: Sophomore QB Dallas Davis is set to make his first career start for the Jaguars. Davis played in six games last season as the backup, completing 11 of 23 passes for 108 yards, one touchdown and one interception.MULLENS A VETERAN: Mississippi States coach Mullen is entering his eighth season with the Bulldogs, which makes him the third-longest tenured coach in the league behind LSUs Les Miles and Alabamas Nick Saban. Mullen has a 55-35 record, including a 26-30 mark in the SEC. Hes led Mississippi State to six straight bowl games, including four postseason wins.JAGUARS NEED JOHNSON: With a first-year quarterback taking the snaps, South Alabama will likely need a big game from running back Xavier Johnson to have a chance on Saturday. The 5-foot-11, 180-pound junior had 1,477 total yards last season, including 956 on the ground.THE RUBBER MATCH: This is the third of a three-game series between the two schools. Mississippi State won 30-10 in Starkville in 2012 and 35-3 in Mobile, Alabama, in 2014.-----Follow David Brandt on Twitter: www.twitter.com/davidbrandtAP . 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