Comma usage near the end of a sentence.

The sentence under consideration:

"And even though it ended the way that it did, one small consolation is that those of us around him can at least say that we got to witness him in the ring, showing his mettle."

The sentence is at the end of an important paragraph in a eulogy and it is meant to be emotive and poetic. The usage of "ring" is a metaphor for a boxing ring.

My concern is that the comma between the words "ring" and "showing" is incorrect, but I want a pause to be there. I looked up usage of dash "—" but that doesn't seem right either.

Is this potentially correct?

Thanks for the help.