07/04/2009 - (Sportsbook Betting Lines) - Streaking Colorado right-hander Aaron Cook makes his 20th career appearance against the Arizona Diamondbacks tonight, when the Rockies host their National League West Division foes at Coors Field for the middle test of a three-game series.
The Rockies won the opener, 5-0, on Friday with a combined four-hit shutout from starter Jorge De La Rosa and relievers Joel Peralta and Huston Street.
Colorado enters the game third in the West, trailing first-place Los Angeles by 8 1/2 games, but entering just a game back of NL wild card-leading San Francisco.
The Diamondbacks, meanwhile, are 20 games out of first place and have the second-worst record in the league.
Cook, a native of Fort Campbell, Kentucky., was just 3-3 after consecutive losses to the Dodgers and Houston Astros on May 26 and June 1. He was unbeaten in his subsequent June starts, winning five straight while allowing just seven runs in 36 innings.
Most recently, in an interleague game at Oakland on June 28, he surrendered just nine hits and a run in eight innings of a 3-1 triumph.
He's 5-4 lifetime against the Diamondbacks in 19 appearances - 17 starts - with a 5.53 earned run average in 107 1/3 innings.
Included is his 2009 season debut in Phoenix, in which he got a no-decision after being ripped for seven hits and six runs in just 2 1/3 innings.
For Arizona, right-hander Yusmeiro Petit returns to the mound for the first time in nearly two months.
The 24-year-old Mexican export was shelved following a 5-4 loss to Washington on May 8, sustaining a strained right shoulder.
In five rehabilitation starts for Triple-A Reno, Petit was 0-1 with a 6.89 ERA.
He faced the Rockies on April 21 in his third outing of the season, getting a no-decision in a 9-6 loss.
The Diamondbacks are winless in six games he's pitched.
On Friday, De La Rosa (5-7) won his third straight start by allowing four walks while striking out six. Peralta and Street combined to hurl a perfect ninth for the Rockies, who were coming off a 5-4 road swing.
Chris Iannetta and Troy Tulowitzki each had two hits and an RBI, and Ian Stewart added a solo homer for the winners.
Max Scherzer (5-6) suffered the loss, allowing five runs -- three earned -- on six hits and a walk, adding five strikeouts in his six-inning start for Arizona, which had almost as many errors (three) as hits (four).
The D-Backs went 15-3 against the Rockies last season, including a 7-2 mark in Denver.
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Las Vegas Sports Consultants (LVSC) is the world’s premier oddsmaking company and the most respected authority on making the lines. Mike Seba is a Senior Oddsmaker at LVSC and has been making lines for the last six years. In our extended interview, Seba explained that there are 4-5 oddsmakers assigned to make lines for each of the major sports (pro & college football and basketball; MLB, NHL, boxing, golf). Each of these oddsmakers bring unique opinions, strengths and weaknesses to the process. Oddsmakers at LVSC are professional sports junkies who love what they do and would probably do it for nothing if you asked them, but they do get paid for it. By necessity their approach is very research-oriented and concise, since with millions of dollars at risk there is little margin for error.
“You either have a passion for it or you don’t,” Seba said.
“The #1 thing for us is to make a line for each game that creates good two-way action. We do this by drawing from past experiences and applying them to current situations. People think it’s much more complicated, but it’s not. “Divided action means the sportsbook is guaranteed a profit on the game because of the fee charged to the bettor (called juice or vig – typically $11 bet to win $10).
Power ratings are the oddsmaker’s value of each team and are used as a guide to calculate a "preliminary" pointspread on an upcoming game. The power ratings are adjusted after each game a team plays. Examples of non-game factors that would require an adjustment to a team's power rating are key player injuries and player trades.
Once a game’s power rating based pointspread is determined, the oddsmaker will make adjustments to that line after considering each team's most recent games played and previous games played against that opponent. Also, adjustments are made after reading each team’s local newspapers to get a sense of what the coaches & players are thinking going into the game.Since the oddsmaker’s ultimate goal is equally dividing the sports betting action, public perception and sportsbook betting patterns must be taken into account. For example, the public might have heavy betting interest week after week on a popular college football betting team such as USC. If an oddsmaker comes up with a preliminary line of USC -7, then an adjustment up to -7.5 or -8 would be made in response to the public’s expected USC bias.
The last step in the line-making process for each oddsmaker is taking one final look to determine whether or not the line "feels right." This is where common sense and past experience with how games are bet enters into the picture.A round-table discussion among the 4-5 oddsmakers involved in making the line for each sport is then conducted and a consensus line is decided upon by the Odds Director before it is released to the sportsbooks. Of the 4-5 oddsmakers, generally the 2 most respected opinions are weighed more heavily by the Odds Director before he decides on the final line.
Experts working for the individual books having a strong opinion on the game
Individual books having players who consistently bet with certain tendencies (such as an extreme bias toward favorites or toward a certain popular team like USC)The purpose of these adjustments, like all line adjustments, is to more equally divide the betting action.
Once betting begins, sportsbooks can adjust the line at any time. In doing so they attempt to make more attractive the team that is getting less action. By moving the line, sportsbooks can influence how the public bets on a particular game.For example, if the pointspread on a game is 7 and most of the money is coming in on the underdog (taking the +7), sportsbooks will then move the number down to 6 ½ to try and attract money on the favorite.
Moving the line is the oddsmaker's effort to balance betting action, and often times such moves can have a major impact on a bettor’s decision. Oddsmakers can also change the line depending on various event-related factors such as player injuries or weather. Obviously, if the line comes out a week ahead of the event (which is the case in football), there is much that could happen during the week leading up to the event that could affect the line. Oddsmakers have to determine if any changes are necessary and send out an "adjusted line."“The main objective is that our clients get equal action on both sides,” Seba said. “We’re not trying to pick the team that covers the spread, we’re trying to make it a coin flip, a tough decision (for the bettor). If we’ve done that, we’ve done our job.”
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