Or maybe they are underbowling him because they dont trust/rate his bowling much anymore?
He had 3 pretty good spells last season for England. For the 6th bowler, they are decent spells.
5th ODI: England v Pakistan at Southampton, Sep 22, 2010 | Cricket Scorecard | ESPN Cricinfo
1st ODI: England v Australia at Southampton, Jun 22, 2010 | Cricket Scorecard | ESPN Cricinfo
2nd ODI: England v Australia at Cardiff, Jun 24, 2010 | Cricket Scorecard | ESPN Cricinfo
Nothing fantastic, but those 2 wickets v Aus were pretty good. I don't think he should be in the side atm, but England haven't utilised him with the ball.
With Collingwood's inevitable departure from all things England, there's going to be a space up for grabs soon. Though there is competition, the likes of Bopara, etc.