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FanGraphs and Baseball Reference agree on a value for replacement level in WAR

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When we talk about WAR, we’ve historically been talking about two different metrics, actually. Because the two entities which developed and calculate WAR — FanGraphs and Baseball-Reference.com — have historically used two different values to determine the “replacement level” component of the stat.

While those of you who dig into these metrics with anything beyond a passing glance were aware of and made accommodations for this, it led to at least some confusion among more casual observers and led to a lot of potshots from the fans and the press looking to take issue with any stat more complicated than batting average. “Hey, why should we care about WAR if you guys can’t even agree what it is,” they would say, prior to coming up with some Edwin Starr/”what is it good for” bon mot which they believe to be original and clever.

Now, however: a grand agreement. From Dave Cameron:

You can calculate replacement level a number of different ways, but in the end, it always leads back to a number in this vicinity. Baseball-Reference arrived at a number a little higher than what Tango had used, while we came up with one a little lower. Because they were at opposite ends of the defensible spectrum, the different baselines gave a false sense of difference in the actual calculations. Now, with an agreed upon replacement level, those differences that are solely due to scale will go away.

There will still be some subtle differences in the ultimate calculation (read Dave’s post for more information on that) but now one big difference is gone, which should lead to a bit more harmony and less unnecessary strife when it comes to this stuff.

I’m sure some people will still take pot shots “Hey, if it’s so good, why do you have to tinker with it all the time!” they will claim, ignorant of how math and science work, but this is a good move.

(why the Mike Trout pic? Eh, didn’t want to use the calculator for two posts in a row)

Joe Mauer reveals he’s had blurred vision since 2013 concussion

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After a decade as the best all-around catcher in baseball Joe Mauer suffered a concussion in August of 2013 that forced him to change positions and marked the end of his time as a great hitter.

Mauer was doing his usual thing at the time of the concussion, hitting .324 with a .404 on-base percentage and .880 OPS. Since returning from the brain injury he’s hit .270 with a .348 on-base percentage and .725 OPS while seeing his numbers decline across the board.

Mauer revealed today to Brian Murphy of the St. Paul Pioneer Press that “lingering symptoms occasionally blurred his vision at the plate the past two seasons” and “he will experiment hitting with sunglasses for the first time to improve his pitch tracking” this season.

Here’s more from Murphy:

Bright sunshine sometimes triggered blurred vision that Mauer links to the concussion with which he was diagnosed in August 2013 after absorbing at least “two significant blows” from foul tips while he was still catching.

“I don’t want that to be kind of an excuse. If I’m out there, I’m out there. That’s just the way I am,” Mauer said. “There are times I’ve gone up to the plate and I just couldn’t pick up the ball. That’s part of the frustration because I’m trying to do everything I can to get back. It just takes time.”

There are more quotes along those same lines and Mauer’s numbers in night games were much better than his numbers in day games last season.

I live in Minnesota and it has been incredibly frustrating to see such a large (or at least vocal) segment of the Twins fan base treat Mauer’s steep decline as if it has nothing to do with the significant brain trauma he suffered. I’m hopeful that Mauer going public about literally struggling to see the baseball while at the plate will convince people to treat him more humanely, but that’s probably wishful thinking at this point.

What a shame, on every level.

Masahiro Tanaka can’t say for sure if he’ll be ready by Opening Day

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Yankees starter Masahiro Tanaka said today that he “can’t say for sure” whether he’ll be ready for Opening Day.

Tanaka underwent arthroscopic surgery in late November to remove a bone spur from his right elbow. Tanaka threw off a bullpen mound Tuesday for the first time since undergoing a cleanup procedure on his right elbow last October and, while healthy, may be behind other pitchers.

Tanaka posted a 3.51 ERA and a 139/27 K/BB ratio across 154 innings last season. He also has a partially torn UCL he’s been pitching through for some time which is always something the Yankees have on their mind when it comes to schedules and workouts for their ace.

Denard Span, not Angel Pagan, will be Giants’ center fielder and leadoff hitter

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Making official what was assumed when the Giants signed Denard Span to a three-year, $31 million contract last month, manager Bruce Bochy announced that Span will start in center field and bat leadoff.

That means 34-year-old Angel Pagan, who’s been the Giants’ starting center fielder and primary leadoff hitter for the past four seasons, will slide to left field and bat further down in the lineup. About a month before the Span signing Bochy said Pagan would remain in the center fielder/leadoff role, but the situation obviously changed.

It’s a move that makes sense, because Span–if healthy following hip surgery–is a superior defensive center fielder with better on-base skills. And if Pagan doesn’t bounce back following a rough 2015 season then having him in left field will make it easier for the Giants to platoon him or bench him in favor of, say, Gregor Blanco or a bigger bat.

Pitchers to receive new visor-like protective headgear

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For the past few years MLB, the MLBPA and cap and helmet manufacturers have been working on various models of protective headgear for pitchers. Some of the models have been unworkable, some of them have not met the satisfaction of pitchers and others have, well, looked a little odd. At present the only pitcher who routinely wears any headgear is Alex Torres, who wears the bulky isoBLOX helmet.

Now, however, there is a new option. And, as you can see above it’s a bit different than what we’ve seen before. It’s more or less like a visor, which will have a nylon top on them to give a full cap-like appearance. The ear flaps will be lefty and righty-specific, given that righties are more likely to be hit on the right and lefties on the left given their follow-throughs.

The new caps will be given out to players this spring and, like the old ones, will be used or not used at the choice of the players. You can read more about the new helmet at ESPN’s Outside the Lines report.