Finley is best known for his long career with the Angels, during which he won more than 15 games six times. He was a very durable pitcher through his career, pitching more than 190 innings a year in 12 of 15 years (1988–2002). His finest season was in 1990, when he won 18 games to just 9 losses and posted a 2.40 ERA — to date, the lowest by an Angel left-hander on a season, surpassing Frank Tanana's 2.43 in 1976. In 1993, Finley led the major leagues in complete games (13) and in 1994 he led the American leagues in innings pitched (183.1). After departing the Angels, Finley signed with the Indians before the 2000 season. He went 16–11 with a 4.17 ERA and posted an 8–7 record with a 5.54 ERA with the Indians in . In 2002, he was 4–11 with a 4.44 ERA in 18 games before being traded to the Cardinals for outfielder Coco Crisp. He finished the season and subsequently his career with the Cardinals, going 7–4 with a 3.80 ERA for the remainder of the season,