Sunday against the Dodgers,the Sox had pulled to within 1 run. Farrell sent Brentz up to hit for Price. LA countered with the right handed Joe Blanton and Ortiz hit for Brentz. Big Papi walked and once he got to second, Wright ran for him. At that point, Hill had already replaced Holt, so the bench was down to Hanley and Leon, and it makes sense that they would be saved until later in the game. So that left a pitcher, and since relievers might still be needed, by extension, a starter.
While Wright was on second, Blanton broke the pitchers' fraternity rules by faking a throw to second, Wright dove back in and hurt himself.
I had no issue with a pitcher running for Papi there; NL pitchers are used as pinch runners all the time. I might have used Pomeranz, who has pinch run this year, but Wright had the longer time to the next start so I can see using him. Frankly, AL managers would greatly increase their flexibility by doing so as well, even if it would be less frequently. It would not kill AL pitchers to work on it in spring training and run some drills on it during the year.
You've heard of the Midas touch? Right now, Farrell has whatever the opposite of that is, no matter what the move.