Boone's pennant winner in 2003. 

The New York Yankees have a new manager: Aaron Boone.

Apparently some people in Boston call him Aaron “Effin'” Boone, after Bucky “Effin'” Dent, since both hit homeruns that won, or helped win, games for the Bronx Bombers over the BoSox in do-or-die situations. Me, I think Dent deserves the epithet; his was the decisive blow in the one-game playoff in '78. Boone? Once the Yankees came back against Pedro in the 8th inning of Game 7 of the 2003 ALCS in the Bronx, it was just a matter of time. If it hadn't been Boone, it would've been someone else. So, nah. He doesn't deserve the epithet.  

Does he deserve the managerial post? Many are wondering. He's never managed before—at any level. He's never coached before—at any level. Andrew Marchand at ESPN asks the right question:

Boone is personable and well-liked, but even with those qualities, it's not hard to wonder: If he didn't hit that walk-off home run in Game 7 of the 2003 American League Championship Series to extend the Red Sox's curse, would he have even been considered for the job?

Here's a question that not many aren't asking anymore: Why didn't the Yanks re-sign manager Joe Girardi, who took the team to within one game of the 2017 World Series? Was it his decision to not contest a HBP against the Indians that wound up costing them the game in the ALDS—a series the Yankees eventually won? Was it the discrepancy between the Yankees 2017 run differential (+198, second-best in the Majors), and their won-loss record (91-71, 8th-best)?

Or did they just decide that 10 years as skipper was enough? 

That last question got me thinking about whether managers with long tenures win pennants and World Series. And this led me to spending way too much time crunching the numbers. Here they are. 

Of the 96 potential pennants since the beginning of the playoff era in 1969 (48 AL, 48 NL), only five have been won with a manager with more than 10 years experience. Most are in the NL: Walter Alston, a 20-year man in 1974; his successor Tommy Lasorda, with 13 years in 1988; and Tony La  Russa twice, in 2006 and 2011, with 11 and 16 years tenure, respectively. In the AL, you just have Earl Weaver in '79. He's the only one. 

As for winning the World Series? It's just Lasorda and La Russa. The longest-tenured AL manager to win the World Series in the playoff era is a three-way tie between Sparky Anderson in '84, Tom Kelly in '91 and Ned Yost in 2015. Each was just in his sixth year of management for that team. 

Here's how the tenures break down for World Series-winning managers:

Basically if you don't win in your first four years, good luck. That's 71% of the titles right there. The Tony La Russas of the world are rare, rare beasts. 

The obvious follow-up: Well, sure, but isn't this a result of the short shelf-life of managers in general? La Russa is a rare beast because most managers get canned sooner rather than later. They get blamed for everything—as you're doing right now. For the 2017 season, for example, only two of the 30 MLB managers had more than 10 years with his current team: Mike Scioscia (18 years) and Bruce Bochy (11 years). The average tenure was 4.8 years, and the World Series wound up as a battle between second-year (Dave Roberts) and third-year (A.J. Hinch) managers. 

Even so, let's take a look at Mike Scioscia. He won it all with the Angels in his third year, 2002, then won five more AL West titles between 2004 and 2009. Since then? With a fairly fat payroll? In one of the weakest divisions in baseball? And with the best player in baseball on his team? The Angels have won just one division title, in 2014, then lost three straight games to the wild card KC Royals. Mike Trout has never been on a team that won a postseason game. In that series, which went into extra innings twice, his team held a lead for all of 1/2 an inning. 

Or how about the winningest manager of the last 20 years? Joe Torre's Yankees won four World Series titles in his first five years at the helm. The next four years, despite better regular-season records, they won just two pennants and no titles—and these seasons are best remembered, and bookended by, excruciating losses to the D-Backs in the '01 World Series and to the BoSox in the '04 ALCS. (Good times.) And in his final three years, despite being stocked with a virtual All-Star team of talent, the Yanks couldn't make it past the ALDS. (Also good times.)

Obviously a lot of factors go into a team's decline and failure. I'm just wondering if one of those factors might be the longevity of the manager. And I'm wondering if Yankees GM Brian Cashman is wondering the same thing.