This is that data:
https://baseballsavant.mlb.com/lead...=player&year=2022&minThrows=100&pos=&team=144
The max throw velocity is a reliable way to measure max arm strength...surely every single player has made at least 1 max effort throw, regardless of position. Notice the average value correlates very well with the max velocity value. This tells me any potential sampling issues are close to non existent.
Arcia max (playing 2B frequently): 90.3
Swanson max (playing SS full time): 87.0
Grissom max (playing 2B full time): 80.0
Albies max (playing 2B full time): 78.3
Additionally, Swanson's arm ranked #48 out of 50 qualified SSs last year, yet he was still an excellent defender. Grissom's arm is significantly weaker than Swanson's.
Grissom's arm is going to be a liability at SS, but it may not be the huge deal we are making it out to be. Remember when everyone thought Camargo was a great SS due to his arm? Yeah....they were wrong. We tend to overrate the value of arm strength for all players.
Grissom might be just fine at SS.