Zac Gallen

5:46pm: Early test results on Gallen’s elbow have been “encouraging,” Bob Nightengale of USA Today tweets. 5:02pm: The Diamondbacks have placed right-hander Zac Gallen (elbow sprain) and first baseman Christian Walker (right oblique soreness) on the 10-day injured list, Nick Piecoro of the Arizona Republic reports. The team also selected righty Seth Frankoff, recalled infielder