The Detroit Lions agreed to a three-year contract with cornerback Amari Spievey, their third-round draft pick from Iowa. Spievey is scheduled to sign Thursday in Allen Park. According to a league source, he will make $1.915 million, including a $700,000 signing bonus. Spievey, 5-feet-11 and 195 pounds, is considered a physical corner and strong tackler who is good in run support and may actually start for the Lions.