Rafael Dolis, a right-handed pitcher from the Dominican Republic, embarked on his Major League Baseball journey with the Chicago Cubs. Signed as an international free agent in 2004, Dolis spent several years honing his skills in the minor leagues before making his MLB debut on September 26, 2011. His initial stint with the Cubs showcased his potential as a relief pitcher, with a fastball that could reach the upper 90s.

During the 2012 season, Dolis appeared in 34 games for the Cubs, recording a 6.39 ERA and earning four saves. Despite his struggles with control, his ability to generate ground balls was a notable aspect of his pitching style. However, inconsistency plagued his time in the majors, and he spent much of the 2013 season bouncing between the Cubs and their Triple-A affiliate, the Iowa Cubs.

After his tenure with the Cubs, Dolis sought opportunities outside of Major League Baseball. In 2014, he signed with the San Francisco Giants but did not make an appearance for the team. Instead, he found a new path in Nippon Professional Baseball (NPB) in Japan, signing with the Hanshin Tigers in 2016. This move marked a turning point in his career, as he became a reliable closer for the Tigers.

In Japan, Dolis thrived, adapting to the different style of play and becoming a key part of the Tigers' bullpen. Over four seasons with Hanshin, he amassed 96 saves and maintained a solid ERA, earning respect and recognition in the NPB. His success overseas eventually led to a return to Major League Baseball.

In January 2020, Dolis signed a contract with the Toronto Blue Jays, marking his return to the MLB. During the pandemic-shortened 2020 season, he appeared in 24 games, posting a 1.50 ERA and securing five saves. His performance helped solidify the Blue Jays' bullpen, and he became a trusted late-inning option for the team.

The following year, Dolis continued with the Blue Jays, though his performance saw some decline. He pitched in 39 games during the 2021 season, recording a 5.63 ERA. Despite the challenges, his experience and previous success provided valuable depth to the Blue Jays' pitching staff.