"It's nothing serious at all," Lee said Friday.
The Cubs decided to sit Lee Wednesday against Pittsburgh, because they didn't want to risk injury on wet grounds. That game was postponed because of rain and will be made up Monday.
Lee was surprised to hear his name mentioned this week in trade rumors. The Angels are looking for a first baseman after Kendry Morales fractured his leg while celebrating a walk-off grand slam. Lee and Xavier Nady were mentioned as possibilities.
"Who are the 'excellent sources?'" Lee said. "I've got nothing for you about that."
Lee has a no-trade clause, so any deal would have to get his approval. The first baseman said he wants to stay in Chicago.
"It happens with every team," Lee said. "When you're not playing well, trade rumors pop up. You turn around and play well and you won't hear them. It's part of the business."