The Cardinals added three minor leaguers and designated veteran reliever Dominic Leone for assignment Wednesday as they set their 40-man winter roster at 40 players a couple of weeks or so ahead of the winter meetings.
In one of the moves, they promoted a Class A pitcher in Alvaro Seijas, fearful that they might lose him as they did right-hander Luis Perdomo, a Class A pitcher in 2015 who leaped right onto the San Diego roster the next spring, winning nine games for the Padres after being taken in the Rule 5 draft at the December winter meetings.