ST. JOSEPH, Mo. (AP) — The Kansas City Chiefs signed left tackle Eric Fisher to a contract extension Saturday, the first day veterans joined rookies on the practice field at Missouri Western for training camp. The Chiefs didn’t announce terms of the extension, but a person familiar with the negotiations told The Associated Press it was a four-year, $48 million deal that includes $40 million guaranteed. The person spoke on condition of anonymity because the contract terms were confidential.

Fisher was the first overall pick in the 2013 draft out of Central Michigan, but he struggled to adjust to the NFL his first couple years. He finally came into his own last season, showcasing the talent that the Chiefs hope can make him their left tackle for the foreseeable future. The Chiefs exercised their fifth-year option on him in May. That means Fisher’s total deal spans six years and $63 million.