Among the rental players, Castro fits the broadest number of teams, given his versatility. The 28-year-old switch-hitter is enjoying a nice season at the plate, hitting .258/.350/.435 with 10 homers, 14 doubles, two triples, eight steals (ten attempts) and a career-best 10% walk rate.
"Adding a steady arm like Keller, who's in his prime and affordably signed for three additional seasons, has to hold appeal for the Blue Jays - particularly given the number of pitching injuries they've seen among their prospect class and other young arms in recent years."
The Toronto Maple Leafs have been active in the trade market, sending Mitch Marner to the Vegas Golden Knights and acquiring Matias Maccelli from the Utah Mammoth.