Plotting baseball team progress

I noticed today that the Cubs and Yankees have the same record. I knew that the Cubs have had some extreme ups and downs this year, but I wasn’t sure if the Yankees had, so I decided to plot their progress over the course of the season so far. A plot of how far above or below .500 they were seemed like the best way to compare their seasons, so I got their records from baseball-reference.com (Cubs results, Yankees results) and cleaned up the data through a combination of Numbers and BBEdit. The result was a pair of CSV files that looked like this: Date,Home,Opponent,Win Mar 26 2026,TRUE,WSN,-1 Mar 28 2026,TRUE,WSN,1 Mar 29 2026,TRUE,WSN,-1 Mar 30 2026,TRUE,LAA,1 Mar 31 2026,TRUE,LAA,-1 Apr 1 2026,TRUE,LAA,1 Apr 3 2026,FALSE,CLE,-1 Apr 5 2026,FALSE,CLE,1 Apr 5 2026,FALSE,CLE,-1 Apr 6 2026,FALSE,TBR,-1 [etc.] These are the first ten games for the Cubs. The Win field contains a +1 for wins and a -1 for losses. The plot of their progress looks like this: The teams were running in parallel…