Tuning up for their championship games, the Reds played the Niagara Base Ball Club of St. Louis on Sunday, April 18, 1875. More than 1,000 fans came out to the Compton Avenue Ball Park and saw the Reds win 14-6. According to the Globe-Democrat, both teams were sporting new uniforms.
The Reds' lineup for the game, which started at 3:15 p.m., was a little different than normal. They played Charlie Houtz at first, Charlie Sweasy (in one of his first games with the club) at second, Trick McSorely at short, Joe Blong, Tom Oran, and Jack Dillon in the outfield, Billy Redmond catching, and Pidge Morgan pitching. One of the reasons for the switch up was that Packy Dillon, the Reds' starting catcher, was out with a "sore hand." Dillon's hand problem would keep him out for much of the season and force the Reds to bring Silver Flint over from the Elephants.
The Globe-Democrat's coverage of this game is one of the few references I can find to Jack Dillon playing for the Reds. They mention the fact that he played left field, went hitless, and muffed a fly ball.