MIAMI GARDENS — Miami Dolphins fans often ask where general manager Chris Grier ranks among his contemporaries. I did some digging. Here’s a big part of the answer: Grier is the NFL’s longest-tenured GM who has never won a playoff game.

That’s shaky ground.

Grier, now in his 10th season as GM, has a 75-73 (.507) record and an 0-3 playoff mark. He’s an intelligent man. He’s well aware he’s in trouble as the Dolphins head toward Sunday’s season opener at Indianapolis .

Disregard what owner Steve Ross has said about Grier’s job performance .

Disregard what fans and media say about Grier .

Consider what the numbers say.

Here are some of the most noteworthy numbers:

— Grier, who was named Dolphins’ general manager in 2016, is the eighth-longest tenured GM in the lea

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