Robert John Zastryzny (za-STRIZ-nee[1] born March 26, 1992) is a Canadian-American professional baseball pitcher in the Chicago Cubs organization.

[3] Zastryzny played for the Calallen High School baseball team as a pitcher and first baseman, but he began to focus on pitching by his junior year.

[11] After the 2015 regular season, the Cubs assigned Zastryzny to the Mesa Solar Sox of the Arizona Fall League.

[12] Zastryzny began the 2016 season with Tennessee, and received a mid-season promotion to the Iowa Cubs of the Triple–A Pacific Coast League.

On March 26, 2019, Zastryzny signed a minor league contract with the Los Angeles Dodgers organization.

In 23 games (19 starts) split between the Double–A Tulsa Drillers and Triple–A Oklahoma City Dodgers, he compiled a 4–8 record and 5.58 ERA with 104 strikeouts across 113 innings pitched.

[19] On November 26, 2019, Zastryzny signed a minor league deal with the Baltimore Orioles organization.

[21] He spent most of the major league season on the team's 60-man alternate training site pool, but was released by the Orioles organization on September 18.

[22] On March 26, 2021, Zastryzny signed with the Long Island Ducks of the Atlantic League of Professional Baseball.

[27] On August 20, 2022, Zastryzny's contract was selected from Triple-A and was promoted to the major league roster.

[29] On November 15, Zastryzny was designated for assignment by the Angels after they protected multiple prospects from the Rule 5 draft.

After a brief stint on the injured list with left forearm inflammation, he was activated and promptly designated for assignment on July 7.