I think the Bell signing is low risk, medium reward. It gives them depth and options, at least until Bulaga comes back.
I do worry that this move was made because they didn't like what they saw from the young guys in OTAs.
I also think Jahri Evans isn't coming back.
I think it's just insurance with all their RT's coming off season ending injuries. If everybody is healthy come September, Bell will be hard-pressed to make the team.