Although Teufel had hit far better against right-handed pitchers in 1985, he was used mainly against left-handed pitchers in a platoon system with New York.
Splitting time with Wally Backman, Teufel started quickly in 1986 with a go-ahead 14th inning single in his first game with the Mets (although they lost in the bottom half of the inning).
His average stayed around .220 into June.
On June 10, Teufel had one of the most exciting moments in the Mets championship season with a walk-off pinch-hit grand slam in the bottom of the 11th inning against the Philadelphia Phillies.

The Mets' reputation as a rowdy bunch was punctuated on July 19 when Teufel, Ron Darling, Bob Ojeda, and Rick Aguilera were arrested after a bar fight with off-duty police officers in Houston, Texas.
Teufel was sentenced to a year of probation and fined $200 for his part and none of the four missed any playing time, though this incident did help fuel some rivalry between the Mets and their impending 1986 National League Championship Series competitors, the Houston Astros.
Teufel managed just one hit and no RBI against the Astros in the Championship Series won by the Mets in six games.

In game one of the 1986 World Series against the Boston Red Sox, the Mets suffered a fate eerily similar to that which they suffered in game one of the 1973 against the Oakland Athletics, in which the usually sure handed Félix Millán committed a third inning error that led to both of Oakland's runs in their 2-1 victory over the Mets.
With a runner on second and one out, Rich Gedman hit a ground ball to Teufel at second which Teufel misplayed, allowing the runner to score.
Boston held on for the 1-0 victory.

He hit a home run in Game five of the Series, but the Mets lost that game.
For the series, Teufel batted .444 with four hits in nine at bats.
The home run was the only postseason RBI and run scored of Teufel's career.

1987 was Teufel's best season statistically as he tied his 1984 home run and RBI highs despite playing in only 97 games.
His .308 batting average, .398 on-base percentage and .545 slugging percentage were career-highs.
Despite significantly outperforming Wally Backman, Teufel continued to be used in a platoon role.
He was given the chance to play every day in 1988, but spent all of April below .200 and missed three weeks from mid-May with an injury ,causing the platoon to be reinstated.

After a poor second half, Teufel was used in just one game in the 1988 NLCS.
In 1989, hot prospect Gregg Jefferies was given most of the time at second base and Teufel spent half of his time at first base.
His playing time further decreased in 1990 as he played in career-lows of 80 games with 175 at-bats while shifting between first, second and third base.
Although Teufel had hit far better against right-handed pitchers in 1985, he was used mainly against left-handed pitchers in a platoon system with New York. Splitting time with Wally Backman, Teufel started quickly in 1986 with a go-ahead 14th inning single in his first game with the Mets (although they lost in the bottom half of the inning). His average stayed around .220 into June. On June 10, Teufel had one of the most exciting moments in the Mets championship season with a walk-off pinch-hit grand slam in the bottom of the 11th inning against the Philadelphia Phillies.
The Mets' reputation as a rowdy bunch was punctuated on July 19 when Teufel, Ron Darling, Bob Ojeda, and Rick Aguilera were arrested after a bar fight with off-duty police officers in Houston, Texas. Teufel was sentenced to a year of probation and fined $200 for his part and none of the four missed any playing time, though this incident did help fuel some rivalry between the Mets and their impending 1986 National League Championship Series competitors, the Houston Astros. Teufel managed just one hit and no RBI against the Astros in the Championship Series won by the Mets in six games.
In game one of the 1986 World Series against the Boston Red Sox, the Mets suffered a fate eerily similar to that which they suffered in game one of the 1973 against the Oakland Athletics, in which the usually sure handed Félix Millán committed a third inning error that led to both of Oakland's runs in their 2-1 victory over the Mets. With a runner on second and one out, Rich Gedman hit a ground ball to Teufel at second which Teufel misplayed, allowing the runner to score. Boston held on for the 1-0 victory.
He hit a home run in Game five of the Series, but the Mets lost that game. For the series, Teufel batted .444 with four hits in nine at bats. The home run was the only postseason RBI and run scored of Teufel's career.
1987 was Teufel's best season statistically as he tied his 1984 home run and RBI highs despite playing in only 97 games. His .308 batting average, .398 on-base percentage and .545 slugging percentage were career-highs. Despite significantly outperforming Wally Backman, Teufel continued to be used in a platoon role. He was given the chance to play every day in 1988, but spent all of April below .200 and missed three weeks from mid-May with an injury ,causing the platoon to be reinstated.
After a poor second half, Teufel was used in just one game in the 1988 NLCS. In 1989, hot prospect Gregg Jefferies was given most of the time at second base and Teufel spent half of his time at first base. His playing time further decreased in 1990 as he played in career-lows of 80 games with 175 at-bats while shifting between first, second and third base.
Tim Teufel