In my last post, which you can read here, I discussed some of the issues with minor league stats and presented one year park factors for teams in the divisions of the Pirates' AAA and AA affiliates. Today, I'll add a few more advanced team numbers (wRAA, wRC, wRC+), as well as park-adjusted metrics for Pirates AAA and AA players in Indianapolis and Altoona.
If you're unfamiliar with these numbers, I recommend checking out FanGraphs. You can read about wRAA here, and wRC and wRC+ here. As a note, for wOBA, I used the basic weights outlined here, then calculated my own version of the wOBA scale to set the wOBA average to .313.
|Toledo Mud Hens||DET||-4||578||104|
|Lehigh Valley IronPigs||PHI||26||610||97|
|Pawtucket Red Sox||BOS||-42||542||93|
|Rochester Red Wings||MIN||-116||454||79|
As you can see, the Pirates AAA affiliate had the most efficient offense after adjusted for stadiums. They produced 89 runs above an average team, and were a full 10% better than the next best team. Not too shabby.
Here are the numbers for the Western Division of the Eastern League (confusing, I know), which is where the Altoona Curve, the Pirates' AA affiliate, play.
|New Hampshire Fisher Cats||TOR||113||741||120|
|Binghamton Rumble Ponies||NYM||9||628||107|
|Portland Sea Dogs||BOS||9||629||103|
|Richmond Flying Squirrels||SFG||-81||505||99|
|Reading Fightin Phils||PHI||-25||575||89|
|Hartford Yard Goats||COL||-48||546||83|
Altoona still checks in with an above-average offense in spite of the fact that its wRAA is slightly negative. They're not particularly elite, but it's encouraging they're at least not in the red. (Note: wRC+ includes an adjustment for park factor, whereas wRAA and wRC don't; I assume this is where the discrepancy comes from. If someone smarter than me knows of a different/better explanation, feel free to let me know.)
Now, let's look at the Pirates minor league players. Below are all of the Pirates' AAA players with at least 100 plate appearances. All numbers are per FanGraphs except for the last one, which is my wRC+ adjusted for park factor. As you can see, the park adjustment adds about 8 points from the unadjusted wRC.
30-year-old Ryan Lavarnway and Jose Osuna, who appeared in 51 games last season, lead the AAA team in wRC+. It also seems worth noting that, while Kevin Kramer posted an excellent wRC+ of 149, that number is boosted by an extremely high BABIP of 0.392, which is likely unsustainable.
The same numbers for their AA affiliate are here.
A few interesting notes here. I've highlighted Cole Tucker and Jason Martin here, as they were recently added to the 40-man roster ahead of the Rule 5 draft. Martin actually produced an impressive OPS of 0.913 and a wRC+ of 160, although, like Kramer, his numbers are likely helped by an unsustainable BABIP. It'll be interesting to see what he does next season.
Also, in case you're interested, another Rule 5 protectee, Mitch Keller, posted a park factor adjusted wRC+ of -7 and 71 in AA and AAA respectively, in 19 and 7 plate appearances.
Next week, I'll try to post the league leaders for wRC+, so we can see where the Pirates minor leaguers stack up against other prospects. I'll also get started on my early estimates for minor league WAR.