What do Dellin Betances' historical comparisons tell us about his future?

Brad Penner-USA TODAY Sports

Betances is on pace to have one of the best seasons from a reliever in modern history. Given his historical comparisons, what does that say about his future?

Dellin Betances is having a historic season so far. After failing as a starter, Betances has been able to harness his electric stuff to become one of the best relievers in baseball. By both RA9-WAR and fWAR (1.2 and 1.3, respectively), Betances has been phenomenal. He has struck out batters at a 15.17 per nine inning clip, and he has allowed only six earned runs, ten walks, 16 hits, and only one home run. If he were to continue at this ridiculous rate, that would put him at about 3.8 WAR over one season, tied for fifth on the single season fWAR list for relievers from 1990 to the present. So, let's suppose that he does pitch that well for the rest of the season (even though he's likely to have bumps in the road). What kind of company does that put him in, and what does that say about his future on the Yankees?

To examine this, here are the best relief seasons since 1990 where the reliever was not the primary closer:

Player Year Season fWAR Years in MLB Career fWAR
Mariano Rivera 1996 4.3 19 40.2
Rob Dibble 1990 4.3 7 12.4
Duane Ward 1991 4.0 9 14.7
Francisco Rodriguez 2004 3.8 13 16.7

There's a clear outlier in this sample. With Mo kindly placed aside (because we do not expect Betances to be the greatest closer of all time), the other players are still pretty encouraging comparisons. When someone has a season that good, it reveals a couple of things: if a pitcher can pitch that well, they deserve to stay around; and secondly (and most importantly), it probably will not continue. The single-season fWAR clearly dominates the career picture of each player--even Mo had about 10% of his WAR accumulation in that one year. And while they appear to be once-in-a-lifetime performances, each player certainly sticks around for a decent amount of time. Although that does not guarantee Betances will be on the Yankees for that long, it certainly inspires confidence that he can.

If there's one thing that this small sample of modern comparisons shows us, it is to cherish the performance. No reliever is ever able to match such a performance in back-to-back years, so love it while you can. Secondly, they have the ability to stick. Betances, given the comparisons, could very well have a career like Francisco Rodriguez. If I were to make a prediction, I would say he would finish somewhere around there--5-10 years in the big leagues and accumulating approximately 10-15 WAR.

Since Betances was once considered a "failed starting pitching prospect", that would not look too bad. So while it would seem nice to believe that Betances is a perennial 3 WAR player, we have to realize that he will probably never pitch like this again. He will probably not be a Hall of Fame closer, but he's at the beginning of what looks to be a successful career as a reliever. Cherish it now while he's at his best.

X
Log In Sign Up

forgot?
Log In Sign Up

Forgot password?

We'll email you a reset link.

If you signed up using a 3rd party account like Facebook or Twitter, please login with it instead.

Forgot password?

Try another email?

Almost done,

By becoming a registered user, you are also agreeing to our Terms and confirming that you have read our Privacy Policy.

Join Pinstripe Alley

You must be a member of Pinstripe Alley to participate.

We have our own Community Guidelines at Pinstripe Alley. You should read them.

Join Pinstripe Alley

You must be a member of Pinstripe Alley to participate.

We have our own Community Guidelines at Pinstripe Alley. You should read them.

Spinner.vc97ec6e

Authenticating

Great!

Choose an available username to complete sign up.

In order to provide our users with a better overall experience, we ask for more information from Facebook when using it to login so that we can learn more about our audience and provide you with the best possible experience. We do not store specific user data and the sharing of it is not required to login with Facebook.

tracking_pixel_9351_tracker