During the next half-century, the stadium was used by various amateur and semi-pro baseball teams (including the Hudson Valley Rookie League's Newburgh Mets in mid-1980s) and Pop Warner football from 1960s till the 1980s.

Minutes before Newburgh's home opener, league president Bud Harrelson announced the Black Diamonds would return in 1999, but only if the team built a new stadium.

Instead, the franchise was sent wandering for several years after a proposed stadium in Easton, Pennsylvania was left unfinished after the builders went bankrupt; the team existed as the Road Warriors through 2004, then again in 2006–07.

The financial downturn, however, has made it difficult for these teams to afford the rent on the stadium; since 2009, the ballpark has mostly sat empty, except for non-athletic gatherings.

One of the new league's founding franchises, the Newts' first home game was played May 20 against the Watertown Bucks, kicking off a planned 66-game schedule that was to run through early August.