From "
What Constitutes a Catch" by Dean Blandino Nov 21, 2017
The 2004 Competition Committee Report stated the following: “Historically, if a player secures legal possession long enough to perform another act common to football, contact by a defender causing the ball to come loose is ruled either (1) a completed pass and fumble or (2) a completed pass and the receiver/runner is down by contact. Having possession long enough to perform another act common to football is defined as controlling the ball long enough to be able to intentionally hand it, pitch it, or pass it. This has been a good guideline over many years, which on-field officials should continue to use.”
During this time, the concept of a “second act” came into play. This was apparently derived from the concept of “long enough to perform another act common to football.” The thinking was if the receiver could perform a second act with the football, such as reaching it out for the line to gain, that he was demonstrating possession.
But Joel Bussert, the league office’s long-time head liaison to the Committee, believed this standard had not been applied correctly and had caused endless confusion about the definition of a catch.
Any act performed while airborne is irrelevant. The whole point of the “common act” concept was to establish a standard for how long a player must hold on to the ball after he hits the ground. If the requirement for “time enough to perform a common act” can be fulfilled before the player has established a firm grip, control and two feet on the ground, there will never be a standard requirement for how long the player must hold on to the ball to complete a catch.
As a result of its study, the Committee recommended (and the membership confirmed) adding to the playing rules the language it had previously expressed in its 2004 report, and a clarifying note that it was not necessary that the player commit such an act, provided he maintained control of the ball long enough to do so.
That is the key point when discussing the Bryant play, or any other play where the receiver goes to the ground to make a catch. When a player goes to the ground in the act of catching a pass, he must maintain control of the ball after his initial contact with the ground. If he doesn’t hold onto the ball when he hits the ground, the pass is incomplete. It doesn’t matter if he stretches the ball out on his way to the ground. He must survive the ground, and that is the bright line for the on-field officials to rule on.
Here's the problem with the connection he makes to the Dez play: Dez wasn't airborne when he reached for the goal line. Not even close. The "common act" happened well after Dez had "established a firm grip, control and two feet on the ground."