3. Mets Prospect Mark Vientos
I think it's highly unlikely Mark Vientos gets the call, but it'd be foolish to think it's impossible. Vientos has the same uphill battle as Dom Smith to climb as he'd be on the team for his bat, not his glove.
Vientos is a third baseman and Eduardo Escobar plays third every day. The DH spot is filled as well, so there isn't really a full-time spot for the Mets fifth-ranked prospect according to MLB.com.
Similar to Khalil Lee, Vientos got off to a slow start at AAA Syracuse but has picked it up. Since the first of May, he's slashed .316/.396/.663 with 10 home runs and 25 RBI. He's been even better this week, hitting four home runs and driving in 11 runs.
Vientos appears to be ready to mash big league pitching, and is an exciting prospect in my opinion, especially with the DH.
With the exciting bat, Vientos does profile as a below average at best defender at the hot corner. That's something that will have to change for him to play third base consistently, but the DH is a very good thing.
I don't see Vientos getting the call-up, especially in a part-time role, but he's knocking on the door. If the Mets suffer an injury and need a big bat to fill in I wouldn't be surprised at all to see the 22 year old get his first taste of Flushing.