As the Rockies’ regular season nears its opening March 28 in Miami, there are a handful of pressing issues to ponder. Here are five important questions Colorado faces. No. 1 — How much of a leash does manager Bud Black give Bryan Shaw and Jake McGee? Shaw, a 31-year-old right-hander, and McGee, a 32-year-old left-hander, are each due $8.5 million this year and had disastrous seasons in 2018.