In the grass
Austin Meadows, Riley Greene, Kerry Carpenter
Akil Baddoo, Eric Haase, Bligh Madris
Parker Meadows, Steele Walker, Jacob Robson
State of the outfield
While not quite as dire, the Tigers could use a right fielder to inject some power into their lineup. Fast riser Kerry Carpenter made a name for himself in just 31 games and appeared in eight games in right, but as previously stated, the Tigers would prefer a right-handed bat.
I'm still of the opinion that Riley Greene will eventually need to patrol a corner spot primarily and while I don't think that time is this year necessarily, if their intent is to sign someone for multiple years, it might be beneficial to have someone that could handle either spot defensively, which would also help a club that is relatively unathletic on paper.
There have been rumors and speculation around two former Padres, Wil Myers and Jurickson Profar, that would each fit the mold of what they are seeking. Assuming Austin Meadows is back and healthy it does wonders for the complexion of the top half of the lineup, but the lack of power 4-9 will need to be addressed in some fashion--corner outfield is likely the best way to do it.