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Morning Mound Visit: sabermetrics news - 12/31/19

How low replacement level can go; what we learned this decade; the Fielding Bible All-Decade Team

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MLB: Houston Astros at Los Angeles Angels Orlando Ramirez-USA TODAY Sports

Tangotiger Blog | Tom Tango: This is a classic exercise of figuring out league replacement level, or the level of your average bench player. By breaking down regular players and bench players you could figure out the average regular level and the average bench level, the logic being that a team of all average regulars would actually be an 89-win team by virtue of having no bench players whose collective winning percentage is closer to .300.

The Athletic | Eno Sarris ($): We learned a lot about baseball this calendar, ranging from the fact that the ball is likely juiced and is having a great effect on the sport; that teams are cheating at a pretty prolific rate; and, strategies that were once effective (like tanking) are becoming less-so as they are more widely used.

Bill James Online | Mark Simon: The Fielding Bible announced their All-Decade Team, and I recommend you take a look at the full list, which includes the likes of Lorenzo Cain, Andrelton Simmons, and Javier Báez, to name a few.