Siegrist appeared in six games for Memphis this month, allowing just one run and three hits in his 6.2 innings pitched while striking out 11. He was 1-3 with a 6.11 ERA in 32 games (28.0 IP) with the Cardinals earlier this season, fanning 33.
Kozma was batting .248 with 8 home runs and 54 RBI in 117 games at Memphis. He has appeared in four games for the Cardinals this season (.333 BA; 1-for-3).
Lyons fanned a career high 8 batters in 4.2 innings of relief in Game 1 of yesterday's double-header, the most by a Cardinals relief pitcher since 1978. Gonzales earned his first Major League win in last night's 13-2 win over Chicago, allowing just one run and three hits in his 6.0 innings of work.