In 1968 Yastrzemski again won the batting championship.
Because of the competitive advantages pitchers enjoyed between 1963 and 1968 (prior to the lowering of the pitcher's mound), Yastrzemski's .301 mark in "The Year of the Pitcher" is the lowest average of any batting champion in major league history; however, he was the only hitter in the American League to hit .300 for that season against such formidable pitching, as well as leading the league in on-base percentage and walks.

In 1969, Yastrzemski had the first of two consecutive 40-home run seasons as he led the Red Sox to third-place finishes that year and the next.
He got four hits, tying the record, and won the All-Star Game MVP in 1970, although the American League lost.
He is one of two players to win the All-Star Game MVP Award despite playing for the losing team, Brooks Robinson having done so in 1966.
Yastrzemski's .329 batting average that season was his career high, but he finished second behind the California Angels' Alex Johnson for the batting title by less than .001.
In 1970 Yaz led the league in slugging and on-base percentage, finishing third in home runs.
In the early 70's, Yaz suffered hand injuries that drastically reduced his power and productivity until healed.
He also suffered a permanent shoulder injury which reduced his power, causing him to change his distinct batting stance.
 
Although he hit but 61 home runs over the next four years (1971–1974) as the Red Sox finished second twice and third twice, he finished in the top 10 in batting, and top three in on-base percentage and walks in 1973 and 1974, and led the league in runs scored in 1974.

In the 1975 All-Star Game, Yastrzemski was called to pinch-hit in the sixth inning, with two men on base and the American League down 3-0.
Without wearing a batting helmet, he hit Tom Seaver's first pitch for a home run to tie the score.
The three-run homer was the only scoring the American League did that night as they lost 6-3.

Yastrzemski and the Red Sox would suffer another World Series loss in 1975, losing four games to three to the Cincinnati Reds.
Yastrzemski made the final out in Game 7 on a fly out to center, trailing by one run.
Coincidentally, he also made the final out of the 1978 American League East tie-breaker game with a foul pop to third base.
This game featured Bucky Dent's famous homer (although Reggie Jackson's home run was the eventual winning run).
Earlier in the game, however, Yastrzemski began the scoring with a home run off left-handed pitcher Ron Guidry, who was having a career year (25 wins, 3 losses and a 1.74 ERA).
It was the only homer the Cy Young Award winner allowed to a left-hander all season.

On May 19, 1976, Yastrzemski hit three home runs against the Detroit Tigers at Tiger Stadium.
He then went to Yankee Stadium and hit two more, tying the major league record of five home runs in two consecutive games.

In 1978 Yastrzemski, then 39, was one of the five oldest players in the league.
On September 12, 1979 Carl Yastrzemski achieved another milestone becoming the first American League player with 3000 career hits and 400 home runs.
In 1982, playing primarily as a designated hitter, an early season hitting streak placed him among the league's leading hitters and saw him featured on the cover of Sports Illustrated and played in that year's All-Star game.
In 1968 Yastrzemski again won the batting championship. Because of the competitive advantages pitchers enjoyed between 1963 and 1968 (prior to the lowering of the pitcher's mound), Yastrzemski's .301 mark in "The Year of the Pitcher" is the lowest average of any batting champion in major league history; however, he was the only hitter in the American League to hit .300 for that season against such formidable pitching, as well as leading the league in on-base percentage and walks.
In 1969, Yastrzemski had the first of two consecutive 40-home run seasons as he led the Red Sox to third-place finishes that year and the next. He got four hits, tying the record, and won the All-Star Game MVP in 1970, although the American League lost. He is one of two players to win the All-Star Game MVP Award despite playing for the losing team, Brooks Robinson having done so in 1966. Yastrzemski's .329 batting average that season was his career high, but he finished second behind the California Angels' Alex Johnson for the batting title by less than .001. In 1970 Yaz led the league in slugging and on-base percentage, finishing third in home runs. In the early 70's, Yaz suffered hand injuries that drastically reduced his power and productivity until healed. He also suffered a permanent shoulder injury which reduced his power, causing him to change his distinct batting stance.  
Although he hit but 61 home runs over the next four years (1971–1974) as the Red Sox finished second twice and third twice, he finished in the top 10 in batting, and top three in on-base percentage and walks in 1973 and 1974, and led the league in runs scored in 1974.
In the 1975 All-Star Game, Yastrzemski was called to pinch-hit in the sixth inning, with two men on base and the American League down 3-0. Without wearing a batting helmet, he hit Tom Seaver's first pitch for a home run to tie the score. The three-run homer was the only scoring the American League did that night as they lost 6-3.
Yastrzemski and the Red Sox would suffer another World Series loss in 1975, losing four games to three to the Cincinnati Reds. Yastrzemski made the final out in Game 7 on a fly out to center, trailing by one run. Coincidentally, he also made the final out of the 1978 American League East tie-breaker game with a foul pop to third base. This game featured Bucky Dent's famous homer (although Reggie Jackson's home run was the eventual winning run). Earlier in the game, however, Yastrzemski began the scoring with a home run off left-handed pitcher Ron Guidry, who was having a career year (25 wins, 3 losses and a 1.74 ERA). It was the only homer the Cy Young Award winner allowed to a left-hander all season.
On May 19, 1976, Yastrzemski hit three home runs against the Detroit Tigers at Tiger Stadium. He then went to Yankee Stadium and hit two more, tying the major league record of five home runs in two consecutive games.
In 1978 Yastrzemski, then 39, was one of the five oldest players in the league. On September 12, 1979 Carl Yastrzemski achieved another milestone becoming the first American League player with 3000 career hits and 400 home runs. In 1982, playing primarily as a designated hitter, an early season hitting streak placed him among the league's leading hitters and saw him featured on the cover of Sports Illustrated and played in that year's All-Star game.
Carl Yastrzemski