The Cubs added prospects Owen Caissie and Ben Cowles to the 40-man roster on Tuesday, before the deadline to protect eligible players from the Rule 5 Draft. To clear spots for them, the Cubs designated for assignment right-hander Adbert Alzolay and outfielder Brennen Davis, homegrown players who have run into injury troubles.
Caissie was a candidate to be called up to the majors late in the season, but the Cubs recalled fellow outfielder Kevin Alcántara, who was already on the 40-man roster, to make his debut in late September.
Caissie spent all season in Triple-A, recording six hits in his first two games at that level.