Ferrick immediately shined upon his arrival in Philadelphia. He made his major league debut against the Boston Red Sox on April 19,, and pitched three scoreless innings in relief. When the first place Cleveland Indians came to Shibe Park on a five-game winning streak for a three-game set against the last place A's on May 18–20, Ferrick appeared in two of the three games. He earned his first major league win in game one of the set, stepping in for an injured Johnny Babich in the fifth inning, and only allowing one Cleveland base runner to reach second base. In the third game of the set, Ferrick closed the game with two perfect innings to allow his team to hold onto a 6–5 lead and sweep the series. Having made four starts for the A's, he pitched his only career shutout on August 21 against the St. Louis Browns. In spite of this one performance, he began to sputter toward the end of the season, going 2–5 with a 6.36 earned run average in August and September. He was selected off waivers by the Indians with five games left in the season, but did not appear in any games for his new club. He finished the season with an 8–10 record and 3.77 ERA in 36 games for the A's.
When he returned to the Indians in, he made just nine appearances before being sold to the St. Louis Browns upon new owner Bill Veeck's dismantling of the club. On August 4, 1946 Ferrick earned both of his first two wins with the Browns in a doubleheader with his former club, the Philadelphia Athletics. After the season, the Browns sold Ferrick to the Washington Senators for a $7500 waiver price. With his new club, he would lose both games of a doubleheader on August 20,. He went 3–12 with a 3.77 ERA over two seasons for a team that finished in seventh place, but was among the league leaders in saves both seasons he was in Washington. Following the season, he was traded back to the Browns with John Sullivan and $25,000 for Sam Dente. Though the Browns lost 101 games in, Ferrick pitched well out of the bullpen, and was the only pitcher on the squad with a winning record. At the trade deadline, he, Joe Ostrowski and Leo Thomas were traded to the New York Yankees for Jim Delsing, Don Johnson, Duane Pillette and Snuffy Stirnweiss plus $50,000.
With a winning ball club for the first time in his career, Ferrick helped the Yankees jumped from a margin of 4.5 games back of the Detroit Tigers to win the American League. He was 1–0 in five appearances against the Tigers, holding them scoreless over a total of 10.2 innings pitched. Overall, Ferrick went 8–4 with a 3.65 ERA and nine saves. He was called by manager Casey Stengel "Our most important individual performer in our drive to the top." He made one appearance in the World Series against the Philadelphia Phillies, pitching the final inning of game three to earn the win. Ferrick started the season with the Yankees, but after poor pitching performances against the Tigers and Red Sox, he was packaged with Bob Porterfield and Fred Sanford, and sent to the Washington Senators for Bob Kuzava.
Coaching & scouting career
Despite the fact that Ferrick pitched respectably in his second go round with the Senators, he sought his release at the end of the season to take on a player/coach role with the Cleveland Indians' triple A affiliate, the Indianapolis Indians in, going 1–1 in 23 games. A season later, when Indianapolis manager Birdie Tebbetts was named manager of the Cincinnati Redlegs, he brought Ferrick along to serve as his pitching coach. He later served as pitching coach for the Philadelphia Phillies, Detroit Tigers and Kansas City Athletics. He became chief scout of the A's from to. In, he joined the expansion Kansas City Royals as a "special assignment scout with emphasis on pitching", and scouted for the club for over twenty years before retiring.
Tom Ferrick died from heart failure at age 81 in Lima, Pennsylvania. His son, Tom Jr., is a former newspaper columnist for the Philadelphia Inquirer, and often recounted anecdotes of his father's playing career in his column. He also had another son and four daughters.
