- Bats Left, Throws Right
- Height 6' 1", Weight 190 lb.
Alex Rubanowitz has played in Switzerland and Czechia and for the Swedish national team.
He is listed as being a California native whose native land is Sweden.  He was All-league in high school.  He hit .244/.324/.300 as a college freshman, playing somewhat regularly. As a sophomore, he started and batted .250/.337/.318. He slumped to .158/.258/.158 in a backup role as a junior then rebounded somewhat to .235/.290/.318 as a senior. 
He was assistant coach for Los Angeles Pierce College. The Gateway Grizzlies signed him in January 2017 but released him in April.  He played for the Zürich Barracudas in 2018 and was named the best hitter in Ligue Nationale A while the team won the regular season. 
Rubanowitz moved up to the Czech Arrows Ostrava for 2019. In the 2019 European Champions Cup, he had four hits and fell a triple shy of a cycle in the opening win over the K. Deurne Spartans, had three hits against Unipol Bologna and again fell a triple shy of a cycle against the Spartans in a win in the 7th/8th place game. He finished at .619/.636/1.000 with 8 runs and 6 RBI in 5 games. The final day's placement games didn't count for the leaderboard but he still finished 1st in average (.625, .054 ahead of Delano Selassa), 7th in slugging (.875, between event MVP Osman Marval and former Cuban MVP Rafael Vinales), 2nd in OBP (.041 behind Sharlon Schoop), tied for 3rd in runs (6), 1st in hits (10) and tied for 2nd with 14 total bases (4 behind Wilson Lee) though he also tied for 2nd with 3 errors. 
In the Extraliga season, he produced at a .347/.433/.637 clip. He scored 66 runs in 47 games, leading the league (6 ahead of Zach Wilson). He was also 6th in hits (also 66), tied for 1st in doubles (18, even with Wilson and Matěj Hejma), 6th in homers (11), 4th in RBI (52, between Wilson and Terrell Joyce), tied for 6th with 27 walks, 9th in slugging (between Martin Mužík and Jakub Sládek) and 9th in OPS. The Arrows won the title. 
He represented Sweden in the 2019 European Championship. In their opener, he started at shortstop and hit third, going 2 for 4 with their only RBI (driving in Joel Johnson with a hit off Twins farmhand Niklas Rimmel in his first at-bat for Sweden) in a 9-1 loss to Germany. He was 2 for 18 the rest of the Euros to finish at .182/.310/.318, albeit with 5 walks in 7 games. His two sacrifice flies tied Curt Smith for the event lead.