interference?

[Bill Baker]

In our senior (winter) Texan league, sliding is prohibited.

R1 is on first. B2 hits a ground ball to deep 3rd. R1 beats the throw to 2B. His momentum carries him into the defensive player who is just off 2B as the ball arrives. As a result of the contact, F4 drops the ball. R1 is off the bag with ball on the ground. BU calls 'safe' and the contact as incidental.

Both umpires have a clear view of the play. In our after-game talk, we agree on what happened and discuss whether interference should have been called because R1 would have been out if F4 had held on to the ball (dropped due to R1's contact). As a result of that contact, do we have INT?