Two sport UConn athletes weren't terribly uncommon back in the day. I think the Dropo brothers all played three sports. More recently, Keith Kraham ('72) was all Yankee Conference in both football (TE) and baseball (OF). Kraham was a Dell All American in basketball in high school, too. Randy Lavigne (early-mid '70's, I think) was a valuable player on both the basketball and baseball teams. I'm sure there are dozens of others, but those leap to mind.
Easy for me to keep track of Randy Lavigne. In 1978-79 he was a senior, which happened to be my freshman year at UConn.