Former West Ham and Wales midfielder Jack Collison announced Saturday he is retiring from football at the age 27 due to injury.

The midfielder, capped 17 times by Wales, made 121 appearances during an injury-hit time with West Ham, moving to Peterborough last year to try and kickstart his career.

He made 12 appearances for the League One outfit, but has now decided to call time on his career due to persistent knee problems.

"My passion for playing is slowly dying out, but my passion for football is burning ever so strong and I intend to stay within the game and make my mark in other areas," said Collison who will now focus on a coaching and media career.

"I have had plenty of time to mull this over and have not acted hastily in this decision and I must say that Peterborough United have acted with class throughout."