To watch just your players plays the closest you can get it to use the play by play filter (
http://userscripts.org/scripts/show/33496 ) and filter it to your players name. It will only show the plays where he is involved in the text stat line, i.e. tackled by, pitch to... You would also have to open the replay into a new window. If you just click the link when you hit the back button the filter would have to be reentered.
Replay Rewrite(
http://userscripts.org/scripts/show/46465 ) highlights your player when he is on the field so you can see which one is yours. No filter though. Just skip to the next play if you aren't in it.