METAIRIE, La. -- Tulane posted two five-run innings Tuesday night en route to dealing No. 18 LSU its first mid-week loss of the season, 12-5, before a crowd of 10,011 at Zephyr Field.
The Tigers (26-13) were a perfect 8-0 in mid-week contests on the year and had won their last nine mid-week decisions dating back to 2005. LSU's previous mid-week loss came in a 9-5 defeat to Southern on May 10 of last season.
Tulane (24-15) has won four out of its last five games and hosts Stephen F. Austin in a three-game series beginning Friday night.
LSU, winners of two straight SEC series, continues league play at Ole Miss this weekend. Game times are scheduled for 6:30 p.m. Friday, 4 p.m. Saturday and 1:30 p.m. Sunday.
Live audio is available to members of the Geaux Zone powered by USAgencies on www.LSUsports.net. Saturday's game will be carried on a tape-delayed basis on the Jumbo Sports Network while Sunday's contest will be broadcast live on the network.
Seven LSU pitchers combined to allow 14 hits and eight walks Tuesday. Two defensive miscues also led to five unearned runs.
Catcher Matt Liuzza and third baseman Will Harris extended their hitting streaks to eight games, and right fielder Quinn Stewart and second baseman J.T. Wise each homered.
Tulane freshman Stephen Porlier (5-3) worked 6.1 innings to pick up the win. Porlier scattered nine hits, allowed five runs, walked two and struck out seven.
LSU sophomore Michael Bonura (2-1) suffered the first loss of his career, allowing five runs (four earned) on five hits in one inning. Bonura was previously 5-0 in 24 appearances.
Stewart, ranked third in the SEC in RBI, drove in his 43rd run of the season in the first on a sacrifice fly. LSU quickly held a 1-0 lead courtesy of shortstop Michael Hollander's run, but the lead vanquished just as quickly as the Tigers established it.
LSU allowed a five-run frame on seven hits -- six of which were singles -- as Tulane batted around in the second inning. First baseman Mark Hamilton ignited the inning with a leadoff hit to right field, and centerfielder Nathan Southard reached on a Wise error.
Bonura then issued three consecutive RBI singles to second baseman Brad Emaus, third baseman Seth Henry and designated hitter Tim Guidry before he left with runners at the corners and nobody out.
Right-hander Derik Olvey, who only fired 18 pitches in a loss to Alabama on Sunday, came in to halt the barrage but surrendered the only extra-base hit of the inning on an RBI double from left fielder Matt Riser.
Wise sliced into the deficit with his eighth homer of the season in the fourth to make it a 5-2 contest.
However, the Green Wave put the game away in the fifth with another five-run inning. Reliever Darryl Shaffer had retired three of the first four batters he faced until surrendering a one-out double to right fielder Warren McFadden. Hamilton drove McFadden in with an RBI single.
The Tigers were one out away from getting out of the fifth, but first baseman Steven Waguespack dropped a shallow fly ball from first baseman Seth Henry, which kept the inning alive.
The bottom of the Tulane order capitalized on the error as the Green Wave batted around for the second time in the game. Jonathan Wilhite, LSU's fourth pitcher of the contest, was caught off guard when Tulane pulled a double steal with runners at the corners.
Wilhite attempted to catch Guidry in a rundown but Henry raced home and scored. Catcher Max Kwan added an RBI single, and Wilhite walked two more batters.
"They had seven earned runs," said LSU coach Smoke Laval, who coached his 700th career game Tuesday night. "Hamilton gets a hit (in the second inning) and we balk him to second. The next pitch is a double play ball, but he kicks it. Waguespack gives the same guy another chance (in the fifth inning). We are out of the inning. There are your two five-spots. We deliver the pitch and don't make the play. That’s the bottom line."
LSU attempted to mount a comeback when faced with the large deficit but a 10-2 margin in the sixth proved to be too much.
Stewart became the second Tiger this season to homer in three consecutive games with a solo shot over the left-centerfield wall in the top half of the sixth.
Hollander and left fielder Bruce Sprowl chased Porlier from the game with back-to-back RBI singles in the seventh.
Tulane added two more runs in the seventh on a sacrifice fly from McFadden and a hit-batsman issued by reliever Chase Dardar.
Tulane 12, LSU 5 (Apr 18, 2006 at Metairie, La.)
LSU.................. 100 101 200 - 5 10 2 (26-13)
Tulane.............. 050 050 20X - 12 14 0 (24-15)
Pitchers: LSU - Bonura; Olvey(2); Shaffer(4); Wilhite(5); Cahill(6); Dardar(7); Harris, W.(8). Tulane - Porlier; Martin(7).
Win-Porlier(5-3) Loss-Bonura(2-1) T-3:08 A-10011
HR LSU - Stewart (17); Wise (8).
Bonura faced 5 batters in the 2nd.