Coleman threw a complete game two-hitter and retired 19 in a row at one point as the Tigers downed Arkansas 5-0 before a crowd of 6,443 Saturday night.
"I think he is 7-1 in league play now in eight starts," Arkansas head coach Dave Van Horn said. "He just did a tremendous job. He threw strikes and just really competed well. He didn't strike us out a bunch, but he got a lot of weak outs, a lot of fly balls and just did a tremendous job."
The Razorbacks (31-13, 14-8) had taken game one 11-4 earlier Saturday with ace Dallas Keuchel holding firm as his team rallied for 10 unanswered runs.
"He (Keuchel) did a good job," Van Horn said. "The first couple of innings were okay and then he got better. We got back in the game. We were down 2-0 before we knew what happened, held them down and then got a bunch of big hits late and did a good job of making the pitchers throw strikes. We had a couple of big hits. It was a good ballgame. But it seems like I can't even hardly remember it, it was so long ago."
It was a doubleheader that was supposed to have started at noon, eventually got going at 5 and finished up after 11.
The two teams are scheduled to meet Sunday at 1:05 p.m. in the rubber game of the series with a lot on the line.
The Saturday split gives LSU (35-13, 15-8) a share of both the SEC overall lead with Ole Miss and Florida – who are also 15-8.
Arkansas is a half-game back of LSU and Ole Miss in both the West Division and in the overall standings.
The only two hits allowed by Coleman (9-2), who walked one and fanned six, were Zach Cox' second-inning single and Jacob House's double in the eighth.
LSU had nine hits in the second game.
Arkansas went into the day expecting to pitch Brett Eibner in game 2, but Van Horn decided to pitch him on Sunday instead and play center.
"I wanted him playing," Van Horn said. "First of all Eibner plays center field the first game and all the games count the same anyway. I just felt like that way I could keep him in the lineup for game two. If I would have pitched Eibner today I would have thrown him in game one. I just didn't want to mess up what we have been doing and that's throwing Dallas in game one."
LSU jumped out front 3-0 by roughing up Arkansas starter and former LSU player T.J. Forrest (2-4) in the opening inning.
Jared Mitchell walked, Ryan Schempf tripled him home and then Blake Dean made it 2-0 with his RBI single.
D.J. Lemahieu walked before Forest began to settle down and retire the next 11 hitters although Sean Ochinko's sacrifice fly made it 3-0 before the inning ended.
"After the first inning, he (Forrest) was pretty good for about three innings," Van Horn said. "I thought (reliever) Sam Murphy did really well (6 strikeouts in 3 2/2 innings). I thought he did the best of them all day."
It became 4-0 in the fifth when Micha Gibbs doubled off the first base bag, Austin Nola moved him over and Mitchell followed by bouncing a double over a drawn in infield.
The Tigers moved their advantage to 5-0 when Ochinko doubled, moved up on a single and came home on a throwing error by Murphy.
Van Horn updated the status of catcher Ryan Cisterna, who was hit by a pitch in the mouth in the first game and had to leave the contest.
"He didn't get hit square on, but he got hit pretty solid in the face," Van Horn said. "He didn't bust any teeth or anything, but it cut him. He was a little woozy, but I wasn't planning on playing him anyway today even if we got into a bind. So we will see how he feels tomorrow."
Arkansas catcher James McCann, who replaced Cisterna, was a shining spot in the loss on a day when he threw out 4 of 5 base runners and has now gunned down 14-of-25 this season.
It was a long day at the ballpark for the Razorbacks and Tigers, who first showed up at 8 a.m.
"I think for everybody, for both teams it was kind of difficult, hanging out yesterday, again today and finally getting to play. I am glad we got two games in."