Looks kinda like a mix of Gripen and Hornet with a single Hornet engine. Front end, fuselage, and intakes look Gripinish down to the sawtooth in the leading edge about midspan, but with the Hornet's LEX added. And the tail end looks like a Hornet but with a single engine.
Interestingly, Boeing designed the aircraft to meet all the USAF requirements and no more so as to ensure min cost/price, even though USAF provided a "cost allowance" for performance that exceeded requirements.