The Mariners have grown concerned about the condition of Felix Hernandez's throwing elbow as a long-term deal is discussed, according to a source.

The two sides had discussed the framework of a seven-year, $175 million deal.

According to sources, the Mariners and Hernandez are not close to finishing an extension as of Sunday afternoon.

"It's an issue," said one source of the perceived elbow ailment.

Hernandez is signed for the next two seasons.