Freehan signed with his hometown Tigers in 1961 for a $100,000 bonus, which his father withheld until he graduated from college in 1966. He broke in briefly with four games at the end of the 1961 season before returning to the minors in 1962. In
1963 he arrived in the majors to stay, working with former catcher
Rick Ferrell on his defense and splitting catching duties with
Gus Triandos, who was traded following the season. The
1964 campaign gave indications of what was to come; becoming the Tigers' full-time catcher with 141 games behind the plate, Freehan batted .300 to finish sixth in the American League (AL), and added 18 home runs and 80
runs batted in. He also led the AL by throwing out 53% of potential base stealers, earned the first of his ten consecutive All-Star selections, and placed seventh in the
Most Valuable Player Award balloting. In
1965, he led AL catchers in
putouts for the first of six times, and received the first of his five consecutive Gold Gloves. In
1966 he again led the league in putouts, and also led in
fielding percentage for the first of four times. in 1966. Freehan had an even better year in
1968 as he was considered the quiet leader of the
1968 World Series championship squad. In a year marked by dominant pitching, he posted career highs with 25 home runs and 84 RBI, fifth and sixth in the AL respectively. Freehan broke his own records with 971 putouts and 1,050 total chances, marks which remained league records until
Dan Wilson topped them with the 1997
Seattle Mariners. He was also hit by 24 pitches, the most in the AL since
Kid Elberfeld in 1911. Despite playing in hitter-friendly
Tiger Stadium, Freehan guided the Tigers' pitching staff to an
earned run average of 2.71, third best in the league. McLain won 31 games and Lolich won 17 as the Tigers ran away with the pennant. Because of his offensive and defensive contributions, he finished second to McLain in the MVP voting. Freehan and
Carl Yastrzemski were the only players to finish in the top ten of the voting in both 1967 and 1968, and only Yastrzemski reached base more often in 1968. Freehan capped his season by recording the final out of the World Series against the
St. Louis Cardinals, retiring
Tim McCarver on a popup. He also made a pivotal play in Game 5, with the Cardinals leading the Series 3-1 and the game 3-2. In the fifth inning,
Lou Brock – whom Freehan had thrown out on an attempted
steal in the third inning –
doubled with one out and attempted to score on
Julián Javier's single, however Freehan successfully blocked the plate with his foot, and held on to the ball even though Brock came in standing up in an attempt to knock the ball loose. Detroit won by scoring three runs in the seventh inning, and went on to take the last two games. Although Freehan's later seasons rarely approached the brilliance of those two campaigns, he continued to turn out All-Star years for the Tigers. His offensive numbers dipped in
1970, but he threw out 47% of potential base stealers (his highest mark since 1964) and had a .997 fielding percentage. In
1971, he rebounded at the plate with a .277 batting average and 21 home runs, three of those coming in one game against the Boston Red Sox in August. He hit .262 for the
1972 Eastern Division champions. He missed the first two games (both losses) of the
1972 American League Championship Series against the
Oakland Athletics while recovering from a hairline fracture of his thumb, then doubled and homered in a 3-0 Game 3 win, in which
Joe Coleman set a League Championship Series record with 14
strikeouts. Freehan drove in the first of three runs in the tenth inning of Game 4 in a memorable 4-3 come-from-behind victory which tied the series; he also drove in Detroit's only run in the 2-1 Game 5 loss. In
1974, splitting time between
first base (65 games) and catcher (63 games), he hit .297 and finished fifth in the American League in
slugging percentage with a .479 mark. He moved back behind the plate the following year to earn his 11th All-Star berth. Freehan ended his career in
1976, batting .270. ==Career statistics==