ADELAIDE has signed NAB AFL Rising Star nominated midfielder Sam Kerridge for another two years.The mature-bodied 20-year-old has emerged as a more than useful player at West Lakes and booted six goals in the club's one-point win over North Melbourne in round nine List manager David Noble said the club was thrilled to lock in a player of Kerridge's ability and character.“We’ve been really impressed with Sam’s development this season, his strong work ethic and his versatility in being able to play forward and, perhaps, in the midfield longer-term,” Noble said.“Sam’s a quality person and we’ve known for a while now that he was going to commit and help us build success here.”Kerridge was drafted to the Crows with pick 27 in the 2011 NAB AFL Draft, before debuting against Hawthorn in round three 2012.He has played 10 games this season, averaging 14 disposals a game.