As coach Dennis Martin Walling (born April 17, 1954) is an American former Major League Baseball player.

Walling served as the hitting coach for the Norfolk Tides, the Triple-A affiliate of the Baltimore Orioles before Butch Davis Walling grew up in Farmingdale, New Jersey,[1] and played baseball at Howell High School in New Jersey.

In 1977, Walling was back in the minors to start the year, but played just three games for the Class-AAA San Jose Missions in the first two months due to injuries.

On June 15, Walling was traded to the Houston Astros for outfielder Willie Crawford, who was playing his last season in the majors after a long career.

He was once again promoted to the majors in September, this time playing in six games, going 6-for-21 (.286 average) with 6 RBI.

In 1978, Walling was the closest thing the Astros had to a regular left fielder, playing 49 games there, more than anyone else on the team.

The Astrodome was a notoriously difficult place to be a batter, but Walling managed to be about an average major league hitter, posting an OPS+ of exactly 100.

[6] Statistically, his best year was 1986, when he set career highs in several categories, most notably in home runs (13) and RBI (58) while batting .312 in 130 games.

[8] In 2007, he was hired by the Orioles as their roving minor league instructor and later became the hitting coach for the Norfolk Tides.