There’s not much more to this than that statement itself, which Ken Rosenthal passed along a few minutes ago. It’s kind of hard to analyze such a rumor in the manner we normally do, however, because (a) all teams should have a strong interest in Upton, so Toronto’s would not be surprising; and (b) Justin Upton is so good that the usual “where would he fit” analysis is rather silly. He fits anywhere, and if he doesn’t, you make room.
The Jays have a lot of pitching, but they’ve learned more than anyone else in recent years that you can never have too much pitching given that, you know, pitchers get hurt.
Beyond that, Upton in Toronto would be more intriguing than Upton in a lot of places, because he truly could help turn the AL East into a four-team cluster if he joined the Jays.