The man was one of the greatest guitarists ever. His work with the Wrecking Crew in LA put him on hundreds, maybe thousands, of records. Sort of an American Jimmy Page in that respect, for a while there he was on almost everything that came out, but he always played with the music and didn't stick out stylistically.
The documentary about his struggle with Alzheimer's, I'll Be Me, is poignant and excellent, I highly recommend it. Ad astra Glen, may you rest in peace.