Pakistan have called up 17-year-old Mohammad Asghar as a back up for legspinner Yasir Shah in the Test squad in Australia. Yasir missed the ongoing tour game in Cairns with a back problem, which prompted the PCB to send the uncapped left-arm spinner Ashgar down under.Left-arm allrounder Mohammad Nawaz is the only other spin option in Pakistans Test squad.Asghar was originally considered for the tour of Australia because he had been pulled out of the ongoing Bangladesh Premier League to play first-class cricket in Pakistan, but the selectors eventually named the same squad that played the Tests in New Zealand.He bowled only 6.2 overs and took one wicket in his first match for United Bank after returning from the BPL, but in his second game he sent down 72 overs in an innings for figures of 3 for 166. Overall, Asghar has played 17 first-class matches and taken 68 wickets at an average of 26.61 since his debut as a 15-year-old in December 2014.Yasir hurt his back during a training session at the Cazalys Stadium in Cairns on December 6. He was being treated for the issue by a doctor in Cairns, and was advised a few days rest. The first Test against Australia - a day-night match in Brisbane - begins on December 15.Yasir is visibly improving but its an important Test and we dont want to take a risk, Amjad Hussain, Pakistan media manager, told ESPNcricinfo. He basically suffered back spasms and is being taken care of with therapy. We are hoping to have him back. But its always good to have back up to counter the worst case.Asghar was picked over experienced left-arm spinner Zulfiqar Babar, who had been Pakistans second spinner in home Tests since Abdur Rehman faded away. Babar travelled to England this summer with the squad, though he did not play a Test. A poor series in the UAE against West Indies - three wickets at 49.66 apiece - followed.The selectors said it was not that lack of form that prompted Babar to be sidelined, though.* Instead, the selectors said, with Asghar merely being cover for Yasir and they being quite confident that the legspinner will be fit to play, they wanted to bring in a young player to get a feel of the international set-up. They were not keen to call in a senior player only to be benched, especially since Babar is set to play the final of the domestic first-class Quaid-e-Azam Trophy in Karachi from December 10.*09.15GMT, December 8: This article was updated with the selectors take on Zulfiqar Babar. Brayden Schenn Jersey . In the lead up - which seemed to begin the moment Mike Geiger blew the whistle in Houston last Thursday night - the Impact rumour mill went into overdrive. The speculation went into meltdown mode, of the golden nugget variety. Barclay Plager Jersey . 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NEW YORK -- The road to success for Tyler Chatwood is pitching on the road.The Colorado right-hander hasnt lost away from Coors Field in 13 starts since July 2013, and he has an idea why that may be.Chatwood threw seven innings of three-hit ball, Carlos Gonzalez homered and drove in four runs and the Rockies defeated the New York Mets 6-1 Friday night for their fourth straight victory.Mark Reynolds homered and Charlie Blackmon had four hits for the surging Rockies. They are 11-4 since the All-Star break and have moved within four games of Miami for the second NL wild-card spot.Chatwood (10-6) improved to 6-0 with a 1.30 ERA on the road this season. The 26-year-old is 4-6 with a 5.69 ERA at home.I know my two-seamers got a little more depth on the road, which is big for me. Thats the pitch I throw the most, so I think it helps to have that, Chatwood said. Overall I think its just executing pitches and I havent executed a lot at home.Gonzalez matched a season-high hitting streak of 11 games with an RBI double in the first. He hit a 448-foot, three-run drive in the ninth for his 21st homer off Antonio Bastardo.He threw me six straight sliders and the one that he missed over the plate was the one I hit over the fence, Gonzalez said. Those are the pitches that weve got to hit and I was ready for it.Steven Matz (8-7) gave up two runs and 10 hits in six innings.James Loney homered for the Mets. Alejandro De Aza had another kind of hit -- he had a pinch-single in the eighth, and later was running to third when he was grazed in the helmet by the shattered barrel of Travis dArnauds bat.Down 3-1, the Mets got a pair of singles to start the eighth off Jake McGee. Scott Oberg relieved and retired the next three batters on just three pitches. The Mets are the majors worst hitting team with runners in scoring position.We are going through a rough time right now. We havent hit with runners in scoring position. Everybody knows it, Mets manager Terry Collins said. We have to quit rubbing their faces in it every day. We have to lighten it up a little bit.Nick Huundleys RBI single in the sixth put Colorado ahead for good at 2-1.ddddddddddddHALL OF FAME WELCOMEThe Mets started a weekend-long tribute to Hall of Famer Mike Piazza, handing out replica jerseys to all fans. A large home plate with Piazzas No. 31 in the middle was etched into the center field grass in anticipation of Saturdays number retirement ceremony.Its truly an honor to be able to celebrate his career here in New York and it means so much and Im so honored to be able to wear that No. 31 on my shoulder, dArnaud said.SETTING THE TONEThe quality start by Chatwood was the 18th in July by Rockies pitching, their highest total in a month since also recording 18 in August 2010.Its the best starting pitching weve had since Ive been here, Colorado manager Walt Weiss said. Thats the biggest reason why were playing well. When you get good starting pitching everything else falls into place.TRAINERS ROOMRockies: OF Ryan Rayburn was a late scratch from the starting lineup after bruising his left knee in batting practice. I think an overthrow when pitchers were doing their throwing program down the line. One got away and hit Raburn right in the knee so it swelled up pretty good, Weiss said. ... OF Gerardo Parra (sprained left ankle) began a rehab assignment with Double-A Hartford on Friday. He played left field for five innings in the first game of a doubleheader, going 1 for 2 with a walk and scoring a run.Mets: 3B Jose Reyes (strained left ribcage) missed his fourth straight game. `Hes a little closer, Collins said. `Weve got to be careful not to overdo it.UP NEXTLHP Jorge De La Rosa (6-7, 5.70) is slated to start for Colorado on Saturday night in a matchup of veterans, opposed by 43-year-old righty Bartolo Colon (9-5, 3.35). The 35-year-old De La Rosa is 2-1 with a 3.79 ERA in three starts at Citi Field. Colon will be starting on short rest, earning the win over St. Louis in the second game of a doubleheader on Tuesday. ' ' '