Summerall also narrated the Arkansas football intro video for a few years. At the 2009 Auburn game, the guy I came with said "Is that Pat Summerall?!" "Proud Razorback" I responded.
Here are some fan-shot clips of a couple of those videos. I apologize for the crude quality, but I couldn't find the videos on the UA website. But if you turn your volume up, you can hear his distinctive voice somewhat clearly.
If anyone can find higher quality versions of either of these videos or the others he narrated, I'd be happy to post them.
Thoughts and prayers go out to Summerall's family and friends.