You'd trade Mercado for a blind guy?
From the AP:
Frazier was placed on the injured list July 1 with what was initially called vertigo and later defined as a possible vision issue. He missed nearly all of the 2018 season with lingering concussion symptoms, but it’s not clear if his current concerns are related.
A 2013 first-round pick by Cleveland, Frazier hit well in 2019 but was banished to Triple-A for much of the season following several defensive miscues.
He finally cracked New York’s crowded outfield for regular playing time in 2020 and shined. He batted .267 with a .905 OPS and steadier defense in left and right field, earning an everyday role for the 2021 season.
The breakout has fizzled this year. Frazier hit .186 with five homers and a .633 OPS in 66 games before going on the IL.
If he passes a physical I'd give him a minor league invite, but I'm wondering if his concussion from 2018 is causing recurring problems.