SANTA CLARA, Calif. -- All week, San Francisco 49ers coach Chip Kelly has refused to name a starting quarterback for his teams preseason opener against the Houston Texans on Sunday.By way of explanation, Kelly cited concern that Colin Kaepernick or Blaine Gabbert could suffer an injury and not be available or be limited for the game.While Kelly often made reference to someone turning an ankle, shoulder fatigue might have been a better guess. Kaepernick did not throw in practice for the second consecutive day Friday because of what he called tightness in his right (throwing) shoulder. Gabbert took all of the repetitions with the first team instead of the customary 50-50 split with Kaepernick.Kaepernick told reporters after Fridays joint practice with the Texans that he thinks hell be able to play Sunday, but his status will be evaluated as the game nears.His throwing shoulders, just from the accumulation of what weve been doing, is a little sore, Kelly said. So were going to monitor that. Hopefully we can get him to play on Sunday.We said that all along, to determine whats going to go on Sunday wont be determined until after we come out of here today. ... So, were going to keep a good eye on him today.Kaepernick wasnt completely out of the mix in Fridays practice, but Kellys definition of limited meant he stuck with handoffs and simulated reps standing behind the quarterback. Thats similar to what Kaepernick did in the spring when he was recovering from shoulder, thumb and knee surgeries.In fact, it was the leftover effect of that shoulder surgery that has Kaepernick feeling the tightness.Kaepernick said he threw over the summer but that theres no way to replicate the different arm action required in live reps during practice. Kelly said his quarterbacks throw the ball between 86 and 102 times during a normal practice session.As a former high school baseball pitcher, Kaepernick said his arm usually snapped back quick after similar arm fatigue.I think its been the buildup [of reps], Kaepernick said. You dont really get the reps of live action and that violent motion when you are practicing in the offseason. So I think its just building my endurance in that area.On Tuesday, Kaepernick stopped in the middle of practice to have his arm stretched by one of the team trainers. He finished the practice and participated in Wednesdays workout at Kezar Stadium, a practice in which he struggled.Kaepernick then didnt practice for what Kelly called a planned day off Thursday and was again limited Friday.Thats why we had planned on actually taking yesterday off, Kelly said. We knew that going in. He didnt throw during the spring full because of coming off of [the injury]. So, its just trying to get his arm back to where we can just use him every day. If weve got to take a day off in between, its not a real big deal.Whether Kaepernick plays, let alone starts, Sundays game against the Texans remains unclear, but he did say he most definitely expects to start a game at some point in the preseason.I would have loved to got those reps, but its also something that we are in preseason practice and we dont play a game for another month, so we want to make sure we stay ahead before we get to the season, Kaepernick said.Gabbert, meanwhile, said he felt good during Fridays practice and directed an offense that had some success against Houston.As for starting against the Texans, Gabbert said he isnt too worried about something that he doesnt control, even if signs point to him getting the first shot.Its up to Coach Kelly, Gabbert said. Coach Kelly makes those decisions and when I do get the chance to get out there and play, Im just going to make the most of my opportunity. Thats all you can do. Whether youre going in the first, second, third or fourth quarter, every quarterback wants to go out there and compete, have fun and just execute our offense and move the ball down the field. Luka Samanic Spurs Jersey .ca! Hi Kerry, Heres an interesting one. I know its common knowledge that all players are responsible for their sticks. We witnessed that when Zack Kassian hit Edmontons Sam Gagner in the face after a missed check. 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Argentina boasts Lionel Messi, Gonzalo Higuain, Sergio Aguero, Ezequiel Lavezzi and Angel Di Maria.Oceanographer confirmed his place in Tuesdays Emirates Melbourne Cup after claiming a last-gasp victory in the Lexus Stakes at Flemington on Saturday. Charlie Applebys British challenger finished with a rattle when third behind front-running stable companion Qewy in the Geelong Cup less than a fortnight ago and was a hot favourite to get back on the winning trail under Kerrin McEvoy.It did not look good for Oceanographers supporters rounding the home turn, with the market leader still last and the pacesetting Tom Melbourne looked set to score after going clear. However, once straightened up, Oceanographer engaged overdrive and got up to land the extended mile-and-a-half prize by half a length.Appleby said: The team down here have done a great job freshening the horse up since Geelong. I saw him on the track this morning jumping and kicking, so we knew he was in good form.Kerrin gave him a great ride. There was always a pace angle in the race and we were going to ride him how we have been doing of late - by dropping him in.ddddddddddddThe track suited him as the straight is longer at Flemington than Geelong and were delighted.The winner of the Lexus Stakes is given automatic entry into the Melbourne Cup and Oceanographer is set to be part of a five-strong Godolphin team.Appleby will also saddle Qewy, Saeed bin Suroor is set to run Beautiful Romance and Secret Number and John OShea has ante-post favourite Hartnell.Its great for our team to have the two runners and fantastic for His Highness (Sheikh Mohammed) to have the five, the trainer added.Hartnell is favourite, I think Oceanographer is second favourite with some bookmakers here now and Qewy is in good form as well.Saeed has his two runners, so its really exciting for all of us. 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