The Pirates hitters who have been the best fits against Framber Valdez are Josh Bell, Corey Dickerson, and Rodolfo Castro , who are all listed among the Pirates’ highest career batting averages versus him. Framber Valdez has also generally done well against Pittsburgh overall, so the sample of standout Pirate success is small.
Which bats stand out
StatMuse shows four Pirates tied for the highest career batting average against Valdez at 1.000, with Josh Bell, Corey Dickerson, and Rodolfo Castro named among that group. That does not mean they are guaranteed answers in a new game, but it does mean they have had real success in limited chances.
For context, Valdez has a 2-1 record with a 6.75 ERA and 17 strikeouts in three career appearances against the Pirates. He has not been untouchable in the matchup, but the Pirates have not consistently punished him either.
What that means in practice
If you are looking for current Pirates hitters to target in a matchup against Valdez, the most useful names are the ones who handle left-handed pitching well and who can put the ball in play early in the count. The available matchup data from recent coverage of Pittsburgh also points to Bryan Reynolds and Alexander Canario as active roster bats with some pop against lefties, though that is not the same as a proven history specifically against Valdez.
The safest read is that there is no long list of Pirates who have clearly owned Valdez. The best answer is a short one: Bell, Dickerson, and Castro have the strongest documented track records in this split, while the broader matchup still tilts toward Valdez.