Fidrych joined the Tigers spring training camp in 1976 and made the roster, though he did not make his Major League debut until April 20, pitching only one inning through mid-May. In his third appearance, on May 15, Fidrych made his first major league
start, caught by
Bruce Kimm, his
batterymate in 1975 at
Triple A Evansville. He held the
Cleveland Indians hitless through six innings and ended up with a two-hit, 2–1
complete game victory, with one walk and five strikeouts. In addition to his pitching, Fidrych attracted attention in his debut for talking to the ball while on the pitcher's mound, strutting in a circle around the mound after every out, patting down the mound, and refusing to allow groundskeepers to fix the mound in the sixth inning. After the game, sports writer Jim Hawkins wrote in the
Detroit Free Press: "He really is something to behold."
Rico Carty of the Indians said he thought Fidrych "was trying to hypnotize them." On May 25 at
Fenway Park in Boston, Fidrych started his second game in front of two busloads of fans who traveled from Fidrych's hometown of Northborough. Fidrych pitched well, allowing two earned runs (a two-run home run by
Carl Yastrzemski) in eight innings, but
Luis Tiant shut out the Tigers, and Fidrych received his first major league loss. On May 31, Fidrych pitched an 11-inning, complete-game victory over the
Milwaukee Brewers. On June 5, he pitched another 11-inning, complete-game victory over the
Texas Rangers in
Arlington. Fidrych continued to pitch well heading into the All-Star break: • June 11: Fidrych pitched a complete game 4–3 victory over the
California Angels before a crowd of 36,377 on a Friday night at Tiger Stadium. • June 19: Fidrych pitched a complete game 4–3 victory over the
Kansas City Royals before a crowd of 21,659 on a Wednesday night at Tiger Stadium. • June 24: Fidrych returned to Fenway Park with his family and friends in the stands. He gave up back-to-back home runs to
Fred Lynn and Yastrzemski but won his sixth consecutive start. • June 28: Fidrych pitched before 47,855 at Tiger Stadium and a national television audience in the millions, as the Tigers hosted the
New York Yankees on
ABC's
Monday Night Baseball with
Bob Prince,
Warner Wolf, and
Bob Uecker in the broadcast booth. Fidrych earned a 5–1 complete-game victory which took only an hour and 51 minutes. Fans would not leave the stadium until The Bird emerged from the dugout for a
curtain call. After the broadcast, which was filled with plenty of "Bird" antics, Fidrych became a national celebrity. • July 3: Fidrych pitched before a sell-out crowd of 51,650 on a Saturday night at Tiger Stadium. He shut out the
Baltimore Orioles, 4–0, improved to 9–1 in ten starts, and reduced his
earned run average (ERA) to 1.85. • July 9: Pitching in front of a sell-out crowd of 51,041 at Tiger Stadium, Fidrych held the Royals to one run in nine innings, but
Dennis Leonard shut out the Tigers 1–0. Despite the loss, Detroit fans refused to leave the stadium until The Bird made a curtain call. Fidrych was named to the
1976 AL All-Star team; the game was played on July 13 at
Veterans Stadium in
Philadelphia. He was named the starter, at the time becoming just the second rookie to start an All-Star game following
Dave Stenhouse in 1962. Fidrych gave up two earned runs in the first inning, none in the second, and took the loss. Just three days later, on July 16, Fidrych won his tenth game, a 1–0 victory over the A's. Four days later in Minnesota, before Fidrych's thirteenth start, the Twins released thirteen homing pigeons on the mound before the game. According to Fidrych, "they tried to do that to blow my concentration." Fidrych pitched another complete game, an 8–3 win, and improved his record to 11–2. On Saturday, July 24, Fidrych surrendered four earned runs on nine hits and lasted only 4 innings;
John Hiller got the win for the Tigers in long relief on the
Game of the Week. After the game, Fidrych was interviewed on live television, and a small controversy arose when Fidrych said "bullshit" on the air. Fidrych recalled: "He (
NBC commentator
Tony Kubek) said, it looked like you were gonna cry. I just said, No, I wasn't about to cry. I was just bullshit.... And then I said, excuse me. I said, I didn't mean to swear on the air but I just showed you my feelings." The next day, Fidrych received a telegram informing him he had been fined $250 by baseball commissioner
Bowie Kuhn; however, it was a prank sent by his own teammates. On July 29 and August 7, Fidrych threw consecutive six-hit complete games. He won one of the games and lost the other. The Tigers edged the Rangers, 4–3, on August 11 as Fidrych notched his 13th win over
Gaylord Perry. Six days later, the Tigers drew a season-high 51,822 fans as Fidrych went to 14–4, beating opposing pitcher
Frank Tanana 3–2. On August 25, the Tigers downed the White Sox, 3–1, in front of 40,000 fans on a Wednesday night in Detroit. Fidrych held the White Sox to five hits in a game which lasted only 108 minutes. Between August 29 and September 17, Fidrych lost three consecutive decisions, bringing his record to 16–9. Fidrych beat the Indians two starts in a row, on September 21 and 28. In his last start of the 1976 season, Fidrych picked up his 19th win, defeating the Brewers, 4–1, giving up five hits. During the offseason between the 1976 and 1977 seasons, Fidrych published an autobiography with Tom Clark titled
No Big Deal. ==Injury and retirement==