didn't throw 68 innings those seasons.
68 innings pitching largely every other day is nothing. It's the job description.
Ryan Pressley has gone 60+ innings 4 times in his career including 65 last year.
Kenley Jansen has thrown 60+ 9 times, including 65 with the Braves 2 years ago. He threw 51 last year.
Will Smith 60+ 6 times including 60 last year at the age of 33.
Raisel Iglesias 60+ 5 times. 58 last year at the age of 33.
Craig Kimbrel 60+ 10 times. 71 last year at age 35.
That's the first 5 high leverage relievers that came to mind. Everyone of them averaged in their career right about what Brusdar threw last year.
It's a silly criticism of Roberts to suggest he's overworking pitchers. It's how the game is played.