Complex sentence: In addition to the blog, Pinto updates on his website the Day by Day Database, which allows users to look at a player's performance over a given period of time, or compare players over a set time period.
Split into simpler sentences: In addition to the blog, Pinto updates the Day by Day database on his website. This database allows users to look at a player's performance over a given period of time, or compare players over a set time period.