I’m more of a Yankees fan myself, but here’s a neat story about a man who captures moments from Mets games in wonderful watercolor sketches:
Turning Woeful Mets Into Works of Art – WSJ.com.

Every morning during baseball season around 6:15 a.m., after driving to Midtown from Manalapan, N.J., Petruccio takes a cup of coffee and sketches a one-page illustration summarizing the previous night’s game. The drawings are topped with tabloid-like headlines and accompanied with short summaries scribbled in ballpoint pen. Sometimes, they’re standard portraits….
On Friday, he walked into his 35th-floor office and reached for a set of notebooks on his desk, topped by mugs bursting with pens and brushes. He found the smallest of the bunch, a softcover Moleskine journal, and fanned through the wavy pages, showing off his achievement. This was his 2010 Mets diary.

Images copyright Natalie Keyssar for the Wall Street Journal

This is a great example of keeping a visual diary. You can see his entries throughout the baseball season at his blog, My Mets Journal.