Your putter has loft, and loft puts the ball in the air
Look at the spec sheet for almost any putter and you will find 2° to 4° of loft. Scotty Cameron’s Phantom line lists 3.5°. L.A.B. Golf’s MEZZ.1 lists 2.5° of static loft. This is deliberate — loft lifts the ball out of the small depression it settles into on the green.
But loft does something else at the same time. It sends the ball up and slightly backward-spinning. For a fraction of a second, your putt is a very small pitch shot. That moment decides the putt, and it is over before your follow-through finishes.

