Pittsburgh Pirates ⇄ Houston Astros

Houston Astros came out ahead by 6.8 WAR, most of it from Gerrit Cole.

Robbie Grossman stayed 3 seasons and was the best of it, and it still came out close to even.

Tony McKnight and Mike Williams changed clubs, and neither amounted to much for either side.

Pittsburgh Pirates came out ahead by 2.0 WAR, most of it from Rich Loiselle.

Glenn Wilson and Billy Hatcher changed clubs, and neither amounted to much for either side.

Pittsburgh Pirates got 18.2 WAR out of Johnny Ray over 6 seasons. Houston Astros got 0.8 from the whole return.

Dave Augustine and Jim Fuller changed clubs, and neither amounted to much for either side.

Houston Astros came out ahead by 13.7 WAR, most of it from Art Howe.

Pittsburgh Pirates came out ahead by 9.0 WAR, most of it from Jerry Reuss.

Tom Parsons and Dave Gerard changed clubs, and neither amounted to much for either side.

Cash considerations is the whole of what changed hands besides Manny Mota.