Mark Stone is projected to be healthy by the time training camp starts and he wants to challenge for an NHL roster spot. "I know I'm knocking on the door," he said. "It's just a matter of me putting together some consistent hockey and showing I can play at this level for an 82-game season." Stone skated in four games with Ottawa last season and he suited up in one playoff game, where he suffered a high ankle sprain. The Senators will see how he does at their rookie camp this week prior to his involvement in the club's main camp next week.