In his junior year, Vanderkaay repeated his four Big Ten victories, and was named Big Ten Swimmer of the Year. He was named All-American in the 200-yard freestyle, 500-yard freestyle, 1,650-yard freestyle, 800-yard freestyle relay, 400-yard medley relay. In his senior year at Michigan, he was the senior co-captain for the Michigan Wolverines. He won four more Big Ten titles, 200-yard freestyle, 500-yard freestyle, 1,650-yard freestyle and 800-yard freestyle relay, and one final NCAA title in the 500. Vanderkaay also placed second in both the 200-yard and 1,650-yard freestyle events at the NCAA national championships.