A standard physical on Washington Wizards center Etan Thomas revealed a heart condition that prevented him from attending the team's first day of training camp, and two league sources with knowledge of the situation said the condition could be career threatening.

Thomas, who was expected to battle rival Brendan Haywood for the starting job at center, instead remained in the District, where he will undergo further testing.

"It's shocking and disappointing. Our thoughts are with him," said Wizards coach Eddie Jordan, who added he talked with Thomas on the eve of training camp. "He's concerned. We're all real concerned."