Is it possible to populate a join table in a HABTM relationship via nested forms (accepts attributes for)?

High level, if I have the following two models with a join table, is it possible to create a nested form which would populate the join table. In this case, I would have a form for Roster with multiple nested forms for players_rosters (the join table). From what I see in playing with this and online is that it is not possible, and probably is a design issue, maybe better to make player_rosters a model that way I could get at it directly (and more easily on my nested form). Any feedback?

create_table “rosters”, :force => true do |t|
t.string “name”
t.integer “fantasy_matchup_id”

create_table “players”, :force => true do |t|
t.string “first_name”
t.string “last_name”

create_table “players_rosters”, :id => false, :force => true do |t|
t.integer “player_id”
t.integer “roster_id”