Tri Tip

Tri Tip, also known as Bottom Sirloin Roast or Santa Maria Roast, is boneless and fairly tender with full flavor. The best way to cook Tri Tip is to roast or grill then slice across the grain, (a very important step).
Tri Tip is a lean cut, with only 2.6 grams of saturated fat & 150 calories in every 3 ounces of meat. 
Tri Tip comes from the Loin Tip, or the Sirloin Primal! This part of the cow provides a lot of different, lean cuts such as top sirloin. 
Try a Tri Tip roast next time you're looking for some lean, flavorful beef!
Info found here