4. Vic Groves
Vic Groves was the fourth player who played for Arsenal and Tottenham but if you were to narrow down his allegiances to one club, it would be Arsenal. Despite first representing the Lilywhites, he made a name for himself later in his career for the Gunners, where he became club captain for some time.
5. Laurie Brown
Laurie Brown played in the defence for Arsenal, but then signed for Spurs in 1964. This isn't the weirdest part of the transfer, though, since soon after he made the switch to Tottenham, he played AGAINST Arsenal as a STRIKER.
Now, we're used to funky tactics under Mikel Arteta, but I'm not sure he would even be brave enough to play a defender as a striker, yet.
6. Jimmy Robertson
Robertson made the switch from Tottenham to Arsenal in 1968, a year after winning the FA Cup with Spurs. Involved as part of a swap-deal with the following player, Robertson didn't quite make it at Arsenal, as he will be remembered more by the Spurs faithful.
Continued on the following slide...