Today's MLB Immaculate Grid has a crossover between the Cleveland Guardians and the Tampa Bay Rays. Completing the grid will require knowledge of MLB stars who played for both franchises.
Fortunately for participants, there's a very recent answer to this query: Aaron Civale.
Prior to the Trade Deadline, Civale was with the Guardians. He was then shipped to the Rays. He's already pitched for them once, so he qualifies for this spot on the grid. At the time of writing, 28% of players had used Civale as an answer.

MLB Immaculate Grid Answers August 14: Which other Rays players have also played for the Guardians?
Here are some other players who played for both the Rays and Guardians:
- Jake Bauers (2019-2021 with CLE, 2018 with TBR)
- Johnny Damon (2012 with CLE, 2011 with TBR)
- Rich Hill (2013 with CLE, 2021 with TBR)
- Corey Kluber (2011-2019, 2022 with TBR)
- Manny Ramirez (1993-2000 with CLE, 2011 with TBR)

Asdrubal Cabrera qualifies for many Immaculate Grid sectors. He played for several teams, and the Guardians (the Cleveland Indians when he played for them) and the Rays are among them. He was with Cleveland from 2007 to 2014 and played the 2015 season in Tampa Bay.
Be sure to visit Baseball Reference for more answers. There, you can find a database of every single MLB player who has suited up for the Rays and Guardians. This will help your rarity score.