Conall wasn't out to break bones. He was just out to... Well, have a scuffle apparently. He was usually more laid-back than that. It wasn't like he was the kind of guy who got into bar fights on a regular basis. Besides, there were plenty of ways of incapacitating an opponent aside from breaking bones - no need for permanent damage.
Satisfied by the impact to Daniel's side, Conall prepared to grab the other man, but Daniel's strike kept him from doing so. The red-haired man was able to deflect the attack, and tried to turn it on Daniel by moving to grab his arm and get him in an arm lock. If he was successful, he intended to use the arm lock to maneuver the agent into a hold that would further incapacitate him.