Roderigo was made to pick a fight with Cassio because Iago told him to. And how did that end up for him? Bruised.

Roderigo was slumped outside with a pout as he rubbed his bruised temple. He’d provoked the drunken Cassio and received a good punch before Montano stepped in, and Roderigo was not taking it well.

“O, Fie on Cassio. Fie on that plan.” He muttered. He was beginning to wonder if this was worth it to get to Desdemona.