Tapani made his major league debut on July 4,
1989. He entered the game in the first inning after starter
Bob Ojeda had given up eight runs to the
Houston Astros while only getting two outs. Thrown into the fire, Tapani completed innings while giving up two hits and three walks, and only allowing one more run. Over the next four weeks, he would only get into two more games, pitching a total of innings in relief. On July 31, just prior to the end of the non-waiver trade deadline, Tapani was included in the blockbuster trade that sent 1988
A.L. Cy Young Award winner
Frank Viola from the Minnesota Twins to the Mets in exchange for major league swingman
Rick Aguilera, minor league relievers
Tim Drummond and Jack Savage, and young starter
David West. Tapani was then thrown into the Twins' starting rotation and finished the 1989 season 2–2 with a 3.86 ERA in innings. After his promising debut, Tapani was made a fixture of the rotation in 1990 and finished the season 12–8 with 4.07 ERA – good enough for fifth place in the
AL Rookie of the Year balloting, a distant 131 votes behind the winner,
Cleveland Indians' catcher
Sandy Alomar Jr. He would follow up his rookie season with perhaps his best overall season in 1991, finishing 16–9 with only 40 walks and 135 strikeouts in 244 innings with 2.99 ERA – the only sub-3.00 ERA of his career. He garnered enough
Cy Young votes that year to finish a distant seventh behind winner
Roger Clemens, as well as his own teammates
Scott Erickson and
Jack Morris, who finished second and fourth respectively; he also won the
1991 World Series with the Twins. Over his seven seasons with the Twins, Tapani was a workhorse starter for the Twins, averaging more than 13 wins and over 200 innings in his five full seasons. After suffering through three poor seasons (the beginning of what would be eight consecutive losing seasons) and looking at losing the soon-to-be free agent Tapani after the 1995 season, the Twins traded him on July 31 to the Los Angeles Dodgers for
Ron Coomer,
Chris Latham,
José Parra, and
Greg Hansell. After finishing 4–2 down the stretch for the Dodgers, Tapani pitched in Game 3 against the
Cincinnati Reds in the National League Divisional series and gave up three runs and four walks in of an inning in relief of starter
Hideo Nomo in a 10–1 loss that capped off the Reds' 3–0 sweep. After being granted free agency in December 1995, Tapani signed a one-year contract with the Chicago White Sox on February 3, 1996, and turned in another typical "Tapani" season for the Sox – finishing 13–10 with a 4.59 ERA and 150 strikeouts in innings. After again being granted free agency following the 1996 season, Tapani moved across town and signed a five-year contract with the Cubs on December 13. On July 20, 1998, while playing for the Cubs, Tapani had perhaps the most memorable day of his career. Throwing eight innings against the Braves, he allowed three runs and topped it off by hitting a third-inning grand slam off former Twins teammate
Denny Neagle in an 11–4 romp over the
Atlanta Braves. Tapani played his last game on September 27,
2001. His career record: 143 wins, 125 losses, and an
ERA of 4.35. In
1998 with the
Chicago Cubs, Tapani earned his best record of 19–9, though his ERA was 4.85. In
1991, with the Twins, Tapani had his lowest ERA of 2.99 to go with a 16–9 record and seventh place in the 1991
Cy Young Award voting. ==Personal life==