He was a 6 ft 5 in (196 m), 200 lb (91 kg) right-handed pitcher who played six seasons (1950–1955) of minor league baseball, but made only one Major League appearance for the 1954 Chicago Cubs. On April 24, 1954, at Crosley Field, Pyecha entered the game in relief of Warren Hacker in the seventh inning with his Cubs trailing the Cincinnati Redlegs 3–2. Pyecha held the Redlegs off the scoreboard in the seventh and eighth innings.
Meanwhile, Chicago rallied to take a 5–3 lead thanks to home runs by Ralph Kiner and Hank Sauer.
Pyecha started the last half of the ninth inning by issuing a base on balls to Gus Bell, then retired Jim Greengrass and Ted Kluszewski to get within one out of the victory. In his lone MLB game, Pyecha allowed four hits and two bases on balls, with two strikeouts, in 2⅔ innings pitched.
Pyecha spent the remainder of 1954 with the Los Angeles Angels of the Pacific Coast League, and retired after the 1955 season having pitched in 154 minor league games.