[3] Grotowski won the Volleyball England Beach Championship at Brighton in 2007 partnered by Jody Gooding.
[5] In 2011 he teamed up with fellow British player John Garcia Thompson; the pair achieved a best finish of seventeenth at the 2011 FIVB Open in Shanghai, China.
[5] At the 2011 Swatch World Tour Prague Open the pair defeated the top seeded American pairing of Casey Jennings and Kevin Wong 25–23, 24–22 in the first round of competition but were then beaten 19–21, 16–21 by Josh Binstock and Richard Van Huizen of Canada in the second round.
[6] Competing with Adrian Carambula, Grotowski finished runner-up at the 2012 Belmar open; the number three seeds were beaten 14–21, 21–23 by Ryan Doherty and Casey Patterson in the final.
[7] Grotowski and John Garcia Thompson were selected to compete for Great Britain at the 2012 Summer Olympics after being chosen ahead of Gregg Weaver and Jody Gooding.