Players notify stadium security when a fan, reaching for a foul ball, drops and then retrieves a gun on the field at Comerica Park. It turns out to be a Glock pistol belonging to an embarrassed off-duty three-year veteran of the Detroit Police Department, who had his weapon fall out of its holster as he went for the ball.

Jeremy Giambi is 4 for 4 with six RBIs to lead the A’s to a 7 – 2 win over the Twins. It is their 15th win in 19 games.

A train carrying toxic substances derails in Baltimore, causing the postponement of the second game of the Orioles’ day-night doubleheader against the Rangers. Texas takes the first game, 6 – 4, behind Frank Catalanotto’s 4-for-4 day, battering Sean Douglass in his major league debut.

The Mets down Florida, 4 – 3, in 11 innings and see Marlins manager Tony Perez ejected for arguing a call. It is his first ejection in 31 seasons and more than 3,800 games as a player and manager.

Houston batters St. Louis, 17 – 11, as 1B Jeff Bagwell hits for the cycle. He is the 212th major-league player since 1901 to cycle, 106th in the National league. The Cardinals score six runs in the 5th inning, but the Astros answer with eight in their next turn at bat. Batting notables include Moises Alou, who has a 3-run home run to stretch his hitting streak to 23 games, and Bobby Bonilla, with his 2,000th career hit. McGwire, with his 564th, and Albert Pujols also homer for the Birds.

The commissioner’s office announces pitch counts, and pitch-count averages will not be used ”as measures of umpire performance”. The baseball’s reversal is in response to the grievance filed by the World Umpires Association, who believed the proposed criteria for evaluation was an attempt to get the umps to reduce the number of pitches in a game by inducing them to call strikes on pitches that weren’t strikes.

Detroit’s Roger Cedeno collects four extra-base hits, including a double, triple, and two home runs. The outfielder’s offensive output enables the Tigers to defeat the Yankees, 12-4, in Game 2 of a day-night doubleheader at Comerica Park.

Indians P Bartolo Colon is ejected from Cleveland’s 10 – 4 win over Houston after throwing a pitch near the head of Astros C Scott Servais, which actually hits his bat. Colon will be suspended six games for his actions.

Expos coach Ozzie Guillen is tossed before the first pitch is thrown, continuing an argument from last night with umpire Greg Gibson. The Expos then pound Boston’s Tim Wakefield to beat the visiting Red Sox, 11 – 7. Five homers are hit in the game, including a 457-foot shot by Vladimir Guerrero.