Scrappy is correct that he didn’t play well, but I wouldn’t say athleticism was the issue. Castle isn‘t a top 10 recruit based upon athleticism, so yeah, when he’s on the court with the DJ Wagners and Justin Edwards of the world he does looks a step slow. But those guys are elite, elite athletes.
Mostly he just missed shots and got frustrated and passive because of it. He missed all the 3s I saw him take, missed his first 3-4 free throws, and missed some bunnies at the rim he normally makes, even against top competition. The format of these types of games are also terrible for him.
He did get into the lane and found guys for wide open 3s, which to me is his best skill. His plus/minus was probably pretty decent because his team was consistently falling behind when he was out and catching up when he was in, at least until the last 5 minutes of the game.
Overall it was a very positive broadcast for UConn. It was on CBSSN, so they talked multiple times about how dominate we were in the tournament. They showed a few highlights of the championship game against SDSU. Talked about Newton and Jackson getting NBA feedback. We were brought up a lot.