2011–2015: Early years While still in college, Crabb partnered with his brother Trevor to compete as an amateur on the domestic beach volleyball circuits. His first professional result was a 49th place at a tournament in
Hermosa Beach, California, in 2011. Upon graduating from Long Beach State in 2014, Crabb signed with
Arago de Sète to play professional indoor volleyball in the French
Pro A league. Sète ended the 2014–15
regular season ranked 6th out of the 14 Pro A clubs, with Crabb contributing mostly as a substitute outside hitter. The club advanced to the championship
playoffs where they were eliminated by
Tours VB in the quarterfinals. In the second leg of the quarterfinals, Crabb scored two points as a substitute in the second set of his team's three-set loss.
2015: Transition to beach In the summer of 2015, Crabb quit indoor to play beach volleyball full-time. Crabb and Trevor also debuted on the
FIVB World Tour at the $75K Xiamen Open in September.
2016: Breakthrough 2016 was a breakthrough year for Crabb, highlighted by two more NORCECA titles and three AVP finals appearances. Overall, he and Trevor finished in the top-three of all seven AVP tournaments they entered, notching victories against top domestic teams including Doherty and Mayer, and Gibb and Patterson. On the World Tour, the pair competed in their first
Major series event at the $400K Gstaad Major. They came through the qualifiers to reach the Round of 16 as the No. 25 seeds, including an upset over the tenth-seeded
Clemens Doppler and
Alexander Horst of Austria, before falling to their fifth-seeded compatriots Gibb and Patterson.
2017–2018: Partnering with Gibb At the end of 2016, Crabb ended his partnership with Trevor to team up with three-time Olympian Jake Gibb. Crabb and Gibb went into the 2017 AVP season as the top seeds, winning two of the six events they competed in. They won their first tournament together at the $87.5K New York City Open in June without dropping a set. The following month, the double-elimination $79K Hermosa Beach Open saw Crabb play against his brother Trevor on the AVP for the first time. Crabb and Gibb defeated Trevor and his new partner Rosenthal in the fourth round of the winners bracket, they then faced Trevor and Rosenthal once more in the finals, beating them in three sets for Crabb's second AVP title. Crabb and Gibb also competed in six events on the World Tour; their best results were three fifth-place finishes. In July, they competed in Crabb's first
World Championships as the No. 18 seeds, posting two wins and two losses to tie for 17th. Crabb and Gibb had a slow start to 2018. On the World Tour, they recorded upsets over top-ranked teams including the reigning
World Champions Evandro Oliveira and
André Stein, but did not progress beyond the Round of 16 in their first six events. Despite Gibb's injury, the pair won two of the seven AVP events they entered that year. They went on to win the season-ending $125K Chicago Championships, defeating Tim Bomgren and
Chaim Schalk in the championship match. Crabb was also the runner-up in three AVP events, losing to Dalhausser and Lucena in the final match each time.
2019–present: First World Tour title In the third year of their partnership, Crabb and Gibb won four of the six AVP events they entered. They started the season as the No. 1 seeds, defeating the teams of
Chase Budinger and Casey Patterson, and Jeremy Casebeer and Chaim Schalk in the finals of the $100K Huntington Beach Open and $75K Austin Open respectively. The pair went on to win the $150K Chicago Championships in August as the No. 2 seeds, recording a two-set victory over the top-seeded Dalhausser and Lucena in the final match. Crabb and Gibb ended the 2019 AVP season beating
Theo Brunner and
John Hyden at the $100K Hawaii Open, rallying from a first set loss to win 18–21, 22–20, 17–15. On the World Tour, the duo began the 2019 season with a fifth-place finish at the $75K Sydney Open in March, and did not place higher than ninth in their next seven tournaments. They entered the
World Tour Finals in September as the No. 17 seeds. In the group stage, they upset Germany's 16th-seeded Nils Ehlers and
Lars Flüggen, and Italy's top-seeded Lupo and Nicolai to advance to the knockout rounds. They eventually lost to the fifth-seeded
Julius Thole and
Clemens Wickler of Germany in the semifinals, and then to the second-seeded Mol and Sørum of Norway in the bronze-medal match. Crabb and Gibb concluded the year ranked eighth in the world. They were scheduled to play together at the
2020 Summer Olympics, but Crabb tested positive for COVID-19 and had to withdraw from the beach volleyball competition. ==Style of play==