The Chicago Cubs are almost perfect.
Coming off a World Series title, FanGraphs’ expected wins totals placed the Cubs at 99 victories back in November.
The young, enviable core remains. The top four starters return from the most effective rotation in baseball last season. While Aroldis Chapman departed, Wade Davis entered. Even David Ross is still around, though he’s moving upstairs to the front office. OK, not everything has gone the Cubs’ way in recent times. Quipped Cubs president Theo Epstein in regard to Tyson Ross‘ decision to sign with the Rangers: “We went 1-for-2 in Ross signings.”
Ross’ choice didn’t seem like a big deal, but maybe it will be a big deal.
As dominant as they were a year ago, the Cubs also benefited from a tremendous amount of good fortune in 2016: their starting rotation remained remarkably healthy.
Consider that, en route to a 103 wins in the regular season, five Cubs starting pitchers – Jake Arrieta, Jason Hammel, Kyle Hendricks, John Lackey, and Jon Lester – made at least 29 starts. It’s an extremely rare feat.
The Cubs are unlikely to be as fortunate this season, and the their rotation depth appeared thin entering the fourth week of January. Regression to the injury-fortune mean, combined with a lack of quality rotation depth, appeared to be the one glaring weakness facing the Cubs. (There are perhaps some bullpen issues, too.)
A Jeff Sullivan study in 2014 found teams can expect to cobble together 32 starts by pitchers outside their top-five rotation options in a given season.
A Jeff Zimmerman study found all pitchers have at least a 40% chance of landing on the disabled list in a season, risk that increases with age.
Andrew Simon of MLB.com wrote last spring that, since 1998, teams have averaged 10.3 starting pitchers used per season. Wrote Simon:
“Just 14 teams — or not even one per year — needed six starters or fewer. The last to do so was the 2013 Tigers.”
Lackey is 38. Lester is 33. Hendricks is coming off a career-high workload. There’s also Arrieta’s second half, including only a 10.6-point differential between his strikeout and walk rates (K-BB%), that has some in Cubs Nation uneasy. Beyond those four reside questionable depth and the unknown.
Read the rest of this entry »