KENT, Ohio (AP) — Cleveland Browns rookie running back Larry Collins has been beserged by problems since the day he set foot in the club's preseason training camp at Kent State University. But the 5-foot-11, 189-pounder from Texas AI has managed to keep his chin up, despite a series of obstacles that would leave most players singing the blues. Actually, Collins’ problems began even before the 1978 National Foot ball League draft when he signed with four separate agents whom he said ‘only caused me heartaches.' “I signed with the wrong agents. They weren’t looking out for my best interests,’’ said Collins, who is the only National Collegiate Athletic Association player, except for Dallas’ Tony Dorsett, to rush for 1,000 yards or more in four consecutive college seasons. He gained 5,300 yards with a 7.4 career average. ‘One agent made a public state ment before the draft that I was a contract breaker and a lot of pro teams avoided me,’ said the third round draft selection. After Collins arrived in camp, he said he had trouble adjusting from the simplified veer offense of his college days to the new, more complex of fense introduced by Browns Coach Sam Rutigliano. Collins suffered further anguish with the news both of his parents were ill. He says both are fine now.