 The rules of the time mandated that such players be kept on the MLB signing club's 25-man roster for two full seasons before they could be optioned to minor league baseball.Kindall appeared in 104 games for the Cubs over the 1956 and seasons and collected only 38 hits (although six were home runs), batting a poor .161.Finally, in 1958, he was able to gain further experience in the Cubs' farm system, playing for two seasons and part of a third for high-level affiliates.