Trio given Blades chance

Sheffield United manager Kevin Blackwell has taken three Barclays Premier League defenders on trial at Bramall Lane.Blackwell is keen to bolster his defence and could take a look at all three players in the Blades' friendly at Burton on Tuesday night.He said: "We're looking at Manchester City's Shaleum Logan for a week, Birmingham's Gregory Vignal is out of contract and Kerrea Gilbert is with Arsenal."They have all been recommended and might possibly all be involved on the night (against Burton)."