Go to TSA.gov and type in "fish rod"... here's what you get:
Fishing rods are permitted as carry-on and checked baggage; however, passengers should check with the air carrier to confirm that the fishing rod fits within size limitations for carry-on items.
Sharp fishing tackle that may be considered dangerous, for example, very large fish hooks, should be sheathed, securely wrapped, and packed in your checked luggage. Like other high-value objects, you may wish to pack expensive reels or fragile tackle that does not pose a security threat (small flies) in your carry-on baggage.
Even if an item is generally permitted, it may be subject to additional screening or not allowed through the checkpoint if it triggers an alarm during the screening process, appears to have been tampered with, or poses other security concerns. The final decision rests with TSA on whether to allow any items on the plane.
Matt
