=== Walker, Alvarez homer in Pirates win ===
 San  Diego, CA ( - Neil Walker and Pedro Alvarez both belted
 two-run homers for the Pittsburgh Pirates, who won the middle installment of a
 three-game set with the San Diego Padres, 4-1, on Tuesday at Petco Park.
 Gerrit  Cole  (6-3) spun 5  2/3 innings of  one-run ball for Pittsburgh, while
 four  relievers didn't  allow a hit over  the final 3 1/3 frames. Jason Grilli
 struck out two in the ninth to nail down his ninth save of the season.
 Cole  allowed just the one run on four hits and a pair of walks while striking
 out  six to win  his third straight decision. The Pirates, who took the series
 opener 10-3 on Monday, have won three straight and five of six.
 "When  you look at the volume of work, he pitched well," Pirates manager Clint
 Hurdle  said of  Cole,  who reached  100 pitches  before  finishing the  sixth
 inning.  "Gave up one  run, got us close to the sixth. All his pitches were in
 play.  12 batters saw  five pitches or more, so that's probably what caught up
 to him more than anything."
 Jesse  Hahn (0-1) was  roughed up for four runs on six hits in 3 2/3 frames in
 his major league debut.
 "Jesse  showed some  flashes of  future  potential," said  Padres manager  Bud
 Black. "Good live fastball, good curveball. He threw the ball well."
 Hahn  tossed  a 1-2-3 top of  the first inning and  struck out the side in the
 second around a Russell Martin single, but ran into trouble in the third.
 Jordy  Mercer, who was the lone player in the game to record two hits, singled
 to  start  the frame.  Cole replaced  him at  first base  after bunting into a
 fielder's choice and with two outs, Walker delivered the eventual game-winning
 two-run homer to center.
 Martin  walked to  start the fourth inning  and Alvarez made it 4-0, driving a
 3-1 offering just over the wall in right field.
 The  four  runs were more than  enough for Cole and Pittsburgh's bullpen. Cole
 kept  the Padres  scoreless through  five innings.  Three straight  singles by
 Chase  Headley, Seth  Smith and Yonder Alonso chased Cole from the contest and
 made  it  4-1, but  Jared Hughes  induced a  Jedd Gyorko  groundout to end the
 Tony Watson took care of the seventh inning and Mark Melancon shut the door in
 the eighth to set the table for Grilli.
                                   Game Notes
 The  Pirates improved  to 7-2 against the National League West this season ...
 Hahn  was the  first Padres  pitcher with  five-plus strikeouts  in his  major
 league debut since 2008 ... San Diego reliever Jason Lane, who played parts of
 six  MLB  seasons as an  outfielder, made his season  debut out of the bullpen
 after  getting recalled from Triple-A El Paso prior to the game. Lane tossed 3
 1/3 scoreless innings of relief.
 06/04 01:46:06 ET