The Arizona Cardinals have signed first-round pick Marvin Harrison to his rookie contract nearly a month after the draft. According toAdam Schefter of ESPN, Harrison’s contract is fully guaranteed and worth $35.37 million with a $22.5 million signing bonus. Harrison signed a four-year deal with a team option for a fifth season in 2028. “It’s my first job,” Harrison said after signing the contract, per AZCardinals.com. “Ever since I got here I’ve been telling people I’m going to work — it’s not practice anymore.” This story is developing. The post Cardinals sign first-round draft pick Marvin Ha…