The Grinnell College volleyball team faces a big challenge this weekend. The Pioneers will go up against division-one competition when they take part in a tournament at Tulsa. Grinnell coach Tom Sonnichson says his oldest son is the head coach at Tulsa and he says he thought it would be interesting to go to the tournament. He says they seldom go against a division one team, and a father and son rarely get to go up against each other. The other teams in the tournament are Charleston Southern and Grambling. He says he has to convince his team that they can be successful against the other teams.Sonnichson says once they recognize they can compete and do well, that should carry over for the whole season.