Who is Tangotiger and why is he writing about WAR for better or worse?

Tangotiger just had several articles published at fangraphs.com, including:

Build a Better WAR Metric, Checkpoint
by Tangotiger - February 25, 2016

For a minority, a vocal minority ...
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Build a Better WAR Metric, Part 2
by Tangotiger - February 24, 2016

Build a Better WAR Metric, Part 3
by Tangotiger - February 25, 2016

What do you think about someone who won't put a name on stuff that he/she writes?

https://praiseball.wordpress.com/2010/05/29/who-is-tangotiger/

Who Is Tangotiger?
Posted on May 29, 2010

Tangotiger is an obvious nom de plume, but I–like many people, I expect–assumed that Tom Tango was his real name, as “Tom M. Tango” appears on the cover of his book...

The name Tom Tango or Tom M. Tango doesn’t really appear until 2006, which makes sense, considering he invented it for the cover of The Book...

his e-mail address then was tangotigre@aol.com, whereas now it’s tangotiger@yahoo.com ...

So the next time you’re in northern New Jersey and meet a 40-something, white (come on, he loves hockey), married, one-child-having, libertarian-leaning Canadian who works for large corporations doing database stuff, graduated college in 1990, and loves escrow accounts, he might just be Tangotiger!
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I had a blogtalkradio thing a few years ago and sent this person an email message asking him/her to be a guest on a specific topic. The reply I finally got stated that only written questions would be answered via email. I dropped the idea.