[CharlesWayneCT]

The substance was on his pitching hand, not his catching hand.

So why does it matter if he wore his glove?

[Diamond]

So why does it matter if he wore his glove?

McCarver remarked that it seemed very unusual for any player to take his glove with him into the clubhouse, and further, to wear it when he was shaking hands with people.

Cordially,

[MadeInAmerica]

The substance was on his pitching hand, not his catching hand.

So why does it matter if he wore his glove?
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rofl, because he could have moved the tar to his glove. Take a look back to the 88 world series. Pitcher was removed and suspended for tar in his GLOVE.

[BOBWADE]

I think the stuff was in in his glove and rubbed off onto his hand.