Active players that have won multiple majors as of now (remaining majors needed for the Grand Slam in paranthesis) and realistically could do it during the coming years:

• Rory (The U.S. Open and The Open - for a 2nd Grand Slam)
• Scottie (The U.S. Open)
• Jordan Spieth (The PGA Championship)
• Xander Schauffele (The Masters and The U.S. Open)
• Collin Morikawa (The Masters and The U.S. Open)
• Brooks Koepka (The Masters and The Open)
• Jon Rahm (The PGA Championship and The Open)

AND - do you think any of the currently active players that have won "only" one of the majors, becomes a winner of one or more of the three others, this season?

• Justin Rose
• Matt Fitzpatrick
• Justin Thomas
• Gary Woodland
• Shane Lowry
• Jason Day
• Hideki Matsuyama
• Bryson DeChambeau