Andrew Helmick’s tryout with the Rams lasted all of seven plays. “I took more time warming up than I did actually catching passes,’’ the 22-year-old wide receiver from Lindenwood University said this week. “I caught seven passes — five from the wide position and two from the slot — and then talked a little with (coach Jeff Fisher). But he didn’t say a whole lot. “At that point, I really didn’t know what to think. I tried to stay positive, but I also wondered, ‘Was I that bad that after just seven passes, he’d seen enough?’’’ But after lunch, Helmick was called upstairs and signed as a college free agent. “It’s just amazing how things work out,’’ said Helmick, a 6-foot, 199-pounder from Winnetonka High in Kansas City. “I had a number of teams talk to me before and after the draft, but the Rams weren’t one of them. I went to rookie tryouts in Atlanta and in Cleveland and felt like I did pretty well. Both teams said they were interested, but Atlanta had a full roster and had to make some cuts to find room and Cleveland said that I really didn’t fit their style. “I was back at the dorms at Lindenwood, trying to decide whether I was going to try and find a team in Canada or maybe give indoor football a shot. But then I get a call from the Rams, go for the tryout and end up with a team that’s just across the river.’’ Helmick enjoyed a record-setting career in St. Charles. He finished as the Lions’ career leader in receptions (153), receiving yards (2,828) and touchdowns (32) while posting 12 100-yard receiving games and four games with 200-plus receiving yards. Last season, he caught 66 passes for 1,363 yards and scored 16 touchdowns. “I’m a competitor, a guy who hates to lose — at anything,’’ said Helmick. “I may not be the biggest or fastest guy but if I have a shot at making a catch or making a play, I’m going to do whatever it takes to get the job done.’’ Helmick said the tryouts with the Falcons and Browns opened his eyes and boosted his confidence. “As a D-II guy, I think there’s always going to be a little doubt at first,’’ he said. “But once I got on the field, I put that aside and just focused on making plays. I realized that I was as good, maybe better, than the (free-agent) guys from bigger schools and even the guys those teams had drafted. I proved to myself that I could play at this level and now I have to make sure that I can prove to the Rams’ coaches.’’ Helmick, whose 40 time is in the 4.3-4.4 range, hopes to make an early impact on special teams and move forward from there. At this point, he said the biggest adjustment is learning the playbook.