[1] Clark's father, Herb, was a sportswriter and the sports editor at The Times in Trenton, New Jersey.

In 1977, the AL ruled all incoming umpires had to use the inside protector, an edict which affected new hires Steve Palermo and Durwood Merrill.

Clark claimed that his friend, collectibles dealer Richard Graessle, had forged his signature.

[7] In 2004, Clark was indicted on federal mail fraud charges for his involvement in a scandal in which baseballs were authenticated as having been used in noteworthy games which they were not, thus inflating their value when sold to collectors.

[6] As of 2008[update], Clark and his wife, Cynthia, live at Ford's Colony, a gated community in Williamsburg, Virginia.