Like Mattingly, Maas was a left-handed batter. As a result many of his home runs went into the right field stands. About halfway through the season a group of a dozen or so young ladies began wearing "Maas-tops" to Yankees home games and sitting in the right field stands. Whenever Maas hit a home run to right, the girls would get up, remove their tops and jump up and down until Maas finished circling the bases. However after a few home runs the women were banned from entering Yankee Stadium.[citation needed]

The following season he served as the Yankees designated hitter and occasional fill in for Mattingly at first base. Even though he played in 148 games, his sophomore season was not as successful as his first. He did hit 23 home runs (in 500 at bats), but hit just .220 with 128 strikeouts.

By 1992, Maas was shuffling back and forth between the major and minor leagues. He was released by the Yankees in 1994. He bounced around between San Diego, Cincinnati, and Minnesota. He briefly returned to the majors in 1995 with Minnesota but it was clear he was a "one hit wonder." Maas then signed with the Hanshin Tigers of Japan's Central League in 1996 to replace Glenn Davis.

As of 2008, Maas works at Charles Schwab as a financial consultant in his hometown of Castro Valley, California. He is divorced and has a daughter named Lacey and a son named Christian. He is regularly invited to Old-Timers' Day at Yankee Stadium and participated in the 2008 game. In the video game Ken Griffey Presents Major League Baseball for Super NES he is the power hitting L. Harlem on the Yankees and is probably the best home run hitter in the whole game.