Hot and Cold Days

This is a list of known factors that result in players having "hot" (increased ratings) or "cold" (decreased ratings) days. Also note that hot and cold days can happen randomly to any player without reason.
All ratings are reported as batting|running|pitching|fielding.
* Kimmy Eckman improves from 6|4|3|3 to 9|7|5|9 when she plays at Eckman Acres. That's that home cooking!
* Maria Luna improves from 6|7|3|7 to 9|9|9|10 when either of her team's colors are pink. She really lives up to her nickname of "Pinky"!
**There are some Save State Hacking related issues and quirks with this one. Maria must come first in the order of the team members in the roster line. To do this without opening the file, either draft Maria first or make sure she always ends the game as the left fielder. It is also possible to make each team's "colors" in the file pink without actually changing the colors of the uniform.
* Angela and Tony Delvecchio improve from 8|4|10|1 and 7|6|3|7, respectively, to 10|9|10|7 and 9|9|7|10, respectively, when they play against each other. Intense sibling rivalry!
* Sally Dobbs improves from 7|7|7|7 to 7|7|10|10 when teammates with her brother, Ronny. Ronny, meanwhile, worsens from 7|6|7|3 to 4|3|4|1. Looks like Sally bossed her brother around a little too much.
* Billy Jean Blackwood worsens from 8|6|4|4 to 3|5|3|1 when teammates with Marky Dubois. Marky, however, improves from 5|4|7|8 to 8|7|10|9. He has a big crush on her and she's not having it!
* Ashley and Sidney Webber both improve from 5|6|7|3 to 8|8|7|8 when they are teammates with each other. Sibling power!
* Amir Khan changes from 7|6|9|4 to 10|8|4|5 when teammates with his brother, Achmed. He really wants to be like his older brother.
* Despite being siblings, there appears to be no change in ratings when Vicki and Kenny Kawaguchi are in the same game.
* Marky Dubois improves from 5|4|7|8 to 8|7|7|9 when playing at Dubois Diamond. Home cooking!
* Marky also improves when playing against the White Sox or Red Sox, and worsens when playing for the White Sox or Red Sox. According to his player bio, he doesn't like socks.
* Reese Worthington improves from 3|8|4|8 to 4|8|6|9 when teammates with Derek Jeter. Perhaps DJ is Reese's idol.
*Lisa Crocket improves from 5/8/6/4 to 6/8/6/8 when teammates with Mike Piazza. Only a thing in Backyard Baseball 2003. Crush on the original Supreme?
* Despite having a namesake field, Pablo Sanchez does not see an improvement when playing at Casa de Pablo.
* Ernie Steele improves from 5|6|7|10 to 9|7|7|10 when playing at Steele Stadium. More home cooking!
* Sammy Sosa and Barry Bonds worsen from 10|8|5|7 and 8|10|6|9, respectively, to 8|8|5|6 and 5|9|4|7, respectively, when teammates with each other. Maybe there was a feud BBL knew about that we didn't. This only applies to Backyard Baseball 2003, not Backyard Baseball 2001.
* Ken Griffey Jr. and Alex Rodriguez worsen from 9|8|5|10 and 7|9|3|9, respectively, to 7|7|5|8 and 6|6|1|6, respectively, when playing at Scrapco Field. The theory is that the developers of the game are Mariners fans and put this quirk in there to make fun of two former Mariners who left Safeco (Scrapco) Field. This only works in Backyard Baseball 2003, because Scrapco Field is not included in Backyard Baseball 2001.
* Jason Giambi worsens from 7|4|7|8 to 6|4|7|7 when he is teammates with Derek Jeter on the Yankees.
* All Backyard and Pro kids receive a small boost in ratings when playing on their birthday, as denoted by their player card. You can also change the date on your computer to match whichever player's birthday you would like it to be.
* It appears that clones of pro/Backyard players do not receive the same increases/decreases as their pro/Backyard counterparts.