Just heard Trigg's explanation again - he did put it into context - in short, 'stitched up' was in reference to the extensive process AFC went through in weighing up Bett's worth(not money worth) to the AFC, and coming to the decision, yes, that's what the club needed.
It wasn't 'stitched up' as in they had Betts agreeing to come to AFC, nor that he'd signed with the AFC.
So it took an "extensive process" to see that Adelaide desperately needed a small forward who could actually kick goals. Jesus Christ.