Here's a list of former Pirates big-leaguers in the Pacific Coast League. I may have missed one or two; if so, let me know in the comments.
Colorado Springs Sky Sox (Brewers): Alex Presley was in late competition with Kirk Nieuwenhuis and fellow former Pirate Keon Broxton for one of two open Brewers outfield jobs, but he lost out and wound up at Triple-A. Presley was improbably successful during much of his career with the Pirates, but he hasn't done much since in two and a half seasons split between the Twins and Astros. Joining him on the Sky Sox roster is Jake Elmore, an infielder who once occupied a spot on the Bucs' 40-man but never played for them.
El Paso Chihuahuas (Padres): Daniel McCutchen, Daniel Moskos. Hey, both the pitching-prospect Daniels from recent Pirates past are here. The Other McCutchen, now 33, is in El Paso for the second straight year. Moskos is now 29 and is attempting a comeback after sitting out last season. (Matt Wieters, meanwhile, is in his eighth season with the Orioles.) Also on the roster is former Pirates third-round pick Alex Dickerson.
Las Vegas 51s (Mets): Stolmy Pimentel is here after a conversion to starting didn't go so well in the Rangers system in 2015. Also featured: former Pirates minor-leaguers Dilson Herrera, Zach Thornton and Nevin Ashley.
Nashville Sounds (Athletics): Andrew Lambo's Triple-A career continues after the A's claimed him from the Bucs in November. He collected one at-bat in Oakland after a brief promotion earlier this month. Lambo now has 100 career minor-league home runs.
New Orleans Zephyrs (Marlins): Don Kelly, sort of famous for attending Point Park, being Neil Walker's brother-in-law, and briefly appearing for the Pirates in 2007, is here. He's now 36. Also on the roster: Robert Andino and Jo-Jo Reyes.
Oklahoma City Dodgers: Sean Burnett, Jose Tabata. Burnett continues to try to make his way back to the majors after seemingly endless struggles with the health of his elbow. He recently signed with the Dodgers after opting out of his minor-league deal with the Nats, and is off to a good start in Oklahoma. He could easily end up in the Dodgers' bullpen if he continues to pitch well. Tabata, meanwhile, hit even worse for Oklahoma City than he had in Indianapolis after being shipped to the Dodgers in the Michael Morse trade. Also, I can't stop looking at his headshot for some reason.
Omaha Storm Chasers (Royals): Travis Snider, Clint Barmes. Snider is off to a good start in Omaha and has a June 1 opt-out date. Given his track record and relative youth, it would be surprising if he kept hitting but didn't manage to find a big-league job. He appears to have lost some weight. Barmes, now 37, is 2-for-22 this season. Also featured on the Storm Chasers' roster is former Pirates second-rounder Brooks Pounders, who's struck out 11 batters in 7.1 innings there. Maybe the Bucs' 2009 draft will produce more than just Brock Holt after all.
Reno Aces (Diamondbacks): Former Bucs closer Matt Capps is listed on Reno's DL. Now 32, he hasn't pitched in the big leagues since 2012.
Round Rock Express (Rangers): Pedro Ciriaco, Ike Davis. Ciriaco, now 30, actually collected 142 at bats with the Braves last year, so fans in Atlanta were probably actually fairly certain he existed. The Rangers signed Davis to a minor-league deal in February after yet another disappointing year, this time in Oakland, in 2015. He's currently dealing with a knee injury.
Sacramento River Cats (Giants): Vin Mazzaro, Duke Welker, Gorkys Hernandez. Mazzaro continues to attract little big-league interest despite posting pretty much everywhere he's gone since 2012. He did pitch a bit for the Marlins last season, also appearing at the Triple-A level in the Marlins and Braves systems. The Bucs released Welker after he had Tommy John surgery in 2014, and he appears to be making a comeback, although he hasn't yet pitched this season. Hernandez signed with the Giants in January after leaving the Pirates via free agency in October.
Salt Lake Bees (Angels): Deolis Guerra is currently on the DL after having an appendectomy. The Angels picked him from the Bucs last winter in the Rule 5 Draft, then outrighted and subsequently re-signed him.
Albuquerque Isotopes (Rockies): None, although Shane Carle, the pitcher the Bucs dealt for Rob Scahill, is here.
Memphis Redbirds: None, but Dean Anna, Jeremy Hefner and former Pirates fifth-round pick Tyler Waldron are all here.
Tacoma Rainiers (Mariners): None, though Adrian Sampson is here. Sampson wilted in seven starts late last season after going from the Bucs to Seattle in the J.A. Happ trade.
Fresno Grizzlies (Astros): None.