'I know he was there': Olympic-bound UM swimmer carries teammate's memory, motivation to Tokyo

"Honestly, he was the best teammate I've ever had. I mean that," Callan said during a recent interview. "He was one of those guys that would always make sure everyone else was OK, in and out of the pool. Even with all the struggles he had ... we all know everything he struggled with ... his priority was making sure the guy next to him was happy and doing well.