The more I think about it, the more likely I think it is Holliday and Mayo start in AAA. Infield is probably Mountcastle/O'Hearn at 1B, Westburg at 2B, Gunnar at SS, and Urias at 3B to start the year. Holliday's stat line looks good, but he's also striking out a ton especially against lefties. Personally, I'd start him at 2B and send him down if he struggles, but I don't think the O's are planning to do that. I think Mayo could be up quick if we trade Urias, or if Urias/Mountcastle/O'Hearn struggles.
I would be shocked if the Orioles make Suarez the 5th starter over Irvin out of the gate. If Irvin struggles to start the year and Suarez looks good, maybe they make the switch.
I think Webb and Akin are both in the pen to start the year and Tate isn't. Tate didn't pitch at all last year and hasn't looked especially great in spring training. I think he's first man up but starts in AAA. Both Webb and Akin are out of options, and Akin has looked pretty good so far.
I agree that Cowser is more likely to make the team than Kjerstad, but who gets their playing time cut out of Hays, Santander, Mullins, Mountcastle and O'Hearn? Wouldn't shock me if they keep both players in AAA until someone gets hurt or is ineffective.
I agree that Nevin, Maton, and McKenna are likely DFA.