Kremer was born in Stockton, Calif., to Israeli parents. He had his bar mitzvah in Israel and is fluent in Hebrew. He won a gold medal pitching for Team USA in the 2013 Maccabiah Games and won the MVP award while pitching for Team Israel in the European Championship qualifiers in both 2014 and 2015.
The right-hander was selected by the Los Angeles Dodgers out of UNLV in the 14th round of the 2016 draft. He was originally selected a year earlier in the 38th round by the San Diego Padres, becoming the first Israeli drafted by a major-league team. However, he decided not to sign, having already committed to complete his senior season in college.
The Dodgers sent Dean and four other players to Baltimore in the 2018 Manny Machado trade. He then made two starts at Single-A Frederick, 15 at Double-A Bowie and four at Triple-A Norfolk, combining for a 9-6 record with a 3.72 ERA.
After pitching 5 1/3 scoreless innings for the Orioles in spring training, he was expected to start the 2020 season at Norfolk. However, the COVID pandemic canceled the minor-league season, and Kremer was added to Baltimore’s 60-man roster and participated in extended spring training. On Sept. 6, he was called up by the Orioles to make his major-league debut against the New York Yankees. He pitched six innings, allowing one earn run and one hit, walked three and struck out seven in Baltimore’s 5-1 victory.
Kremer led all minor-league pitchers with 178 strikeouts in 2018.