Great steal for a deep league. I think he can be a poor-man's Andrus/Aybar. 5-8 HR 30 SB is attainable this year with full-time at bats, with upside for more as he gains experience. But as you said, the runs and the average are impossible to predict right now. As it stands now, he'll likely be slotted into the #8 spot in front of the pitcher, so his runs will be limited and the amount of good pitches he sees will be limited as well. Right now, Aoki and Weeks are slotted #1/2 in the order. And if one of them start slow or get injured, Carlos Gomez will likely get the first chance to move up. So Segura will need to both light it up and will need a lot of pieces to fall for him to be moved up in the order. Accordingly, Segura is no more than a late-round flyer as a low-end #2 SS/high upside #3 SS.