Rails - Nov 2005 - why is Player a reserved word?

Hi,

Why is Player a reserved word?

$ ruby script/generate model Player -p
  The name ''Player'' is reserved by Ruby on Rails.
  Please choose an alternative and run this generator again.

  Suggestions:

Sense 1
player, participant -- (a person who participates in or is skilled at 
some game)
       => contestant -- (a person who participates in competitions)


Sense 2
musician, instrumentalist, player -- (someone who plays a musical 
instrument (as a profession))
       => performer, performing artist -- (an entertainer who performs a 
dramatic or musical work for an audience)


Sense 3
actor, histrion, player, thespian, role player -- (a theatrical performer)
       => performer, performing artist -- (an entertainer who performs a 
dramatic or musical work for an audience)


Sense 4
player -- (an important participant (as in a business deal); "he was a 
major player in setting up the corporation")
       => participant -- (someone who takes part in an activity)

TIA

Jeroen