the Chicago Cubs (the c on their hats at least)
The Detroit Lions of the NFL.
The Toronto Blue Jays, Major League Baseball
There are quite a number of various sports teams, native to the United States, which use various kinds of logos to represent themselves with. The team with an eagle in the logo is the Philadelphia Eagles football team.
Barclays uses a blue eagle as their logo.
The college team that uses the Buffalo Bills' logo is the University at Buffalo, specifically the Buffalo Bulls football team. They incorporate a blue and white color scheme and a bison mascot, which is a nod to the buffalo theme. While they have their own distinct branding, the connection to the Bills is evident in the regional pride and shared iconography of the buffalo.
The US basketball DREAM logo uses a custom font called TS2. It was custom made for this logo and therefore may not be able to be used for personal typing and other logos.
Kmart uses a K as its logo.
I'm pretty sure it is Aeropostale that uses the butterfly logo...but I'm not so sure any designer uses it. :-)
The logo that the NFL uses was created in 1960.
WWF uses a pandabear in it's logo.
The Hendrick Motorsports logo features a custom-designed font that is not publicly available as a standard typeface. The lettering is bold and stylized, conveying a sense of speed and precision, which aligns with the branding of the racing team. The logo primarily uses red, white, and blue colors, reflecting the team's American heritage.
The Hallmark Channel uses a gold crown for its logo. It is the same logo Hallmark has been using for years on their greeting cards and gifts.