ST. JOSEPH, Mo. — Sammy Watkins made quite the impression on the first day of Kansas City Chiefs training camp on Thursday.The veteran wide receiver is one of the newest options for first-year starting quarterback Patrick Mahomes.”The guy’s an unbelievable talent, he really is,” tight end Travis Kelce said of Watkins.”He’s a high-character guy, you can’t say anything wrong about him. It’s been exciting just to see him come out here and work because he’s such a great athlete and he makes you want to get better every single day.”Mahomes and Watkins teamed up to elicit the biggest cheer of the day from fans attending the opening of camp.The quarterback dropped a 60-yard pass on a breezy post route to Watkins, who hauled in the over-the-shoulder catch on the run for an easy score. Mahomes said he’s quickly developing a rapport on the field with the newcomer.”He’s a guy that will stay after and get extra work, a guy that wants to put the work in to be great,” Mahomes said.”When you have guys like that all around our team, it’s easy to build chemistry and build that kind of deep ball or if it’s a short pass or whatever it is.”Coach Andy Reid also praised the willingness of Watkins to push himself during practice, whether it’s running out routes where he’s a decoy or putting in extra reps.”I love Sammy’s attitude and his work ethic,” Reid said. “He’s all business, he’s a quiet guy. He’s all business. I love the way he goes about, a true pro.”For the first time in his career, Watkins comes into the season healthy and with a full offseason of work. That’s helping him acclimate to Reid’s West Coast offense playbook.”I’ve gotten the plays down but of course we’ve got so much to build on with chemistry and working with the guys,” Watkins said.”The offense is so bright you can’t sleep on it so everyday we’ve got to go over it and go over the installs.”The offseason addition of Watkins figures to make the Chiefs offense a puzzle for defenses this season. The team returns three 1,000-yard performers from last season, including the league’s leading rusher in Kareem Hunt. Kelce and wide receiver Tyreek Hill topped the 1,000-yard mark in receiving yards.