[DC 86]

Posey may have led the league in doubles by catchers and had a decent OPS, but he was a poor run producer in 2017.

Well, among catchers with a minimum of 300 plate appearances (33 players qualified), Posey led the major leagues in both RC (Runs Created) and RC/27 (Runs Created per 27 outs).

If you are looking solely at context-driven raw stats such as Runs and RBI you run into the problem of not being able to put up big numbers if your teammates aren't on base and aren't driving you in when you reach base. But in terms of rate stats Posey was still the best run producing catcher in the majors (just ahead of Gary Sanchez). If Posey batted in a lineup surrounded by Aaron Judge et al he would deliver the superficial raw numbers that you are looking for.

[DC 86]

Posey may have led the league in doubles by catchers and had a decent OPS, but he was a poor run producer in 2017.

Well, among catchers with a minimum of 300 plate appearances (33 players qualified), Posey led the major leagues in both RC (Runs Created) and RC/27 (Runs Created per 27 outs).

If you are looking solely at context-driven raw stats such as Runs and RBI you run into the problem of not being able to put up big numbers if your teammates aren't on base and aren't driving you in when you reach base. But in terms of rate stats Posey was still the best run producing catcher in the majors (just ahead of Gary Sanchez). If Posey batted in a lineup surrounded by Aaron Judge et al he would deliver the superficial raw numbers that you are looking for.