Shawn Marion insists the timing is coincidental. Yes, the NBA trade deadline is Feb. 21. Yes, Marion scored a season-high 26 points and pulled down 11 rebounds in Saturday night’s 116-91 blowout over Golden State at American Airlines Center. Yes, Marion has had four double-doubles in the last five games. Marion says he’s simply in an offensive groove, although it’s natural for others to surmise that he’s showing his wares for contending teams that might be in the market for a versatile, 6-foot-7, 230-pound 34-year-old who clearly still has game. “I’m just playing ball,” Marion said, after shooting 11-of-16 from the field and also contributing two steals against the Warriors. “When (trade) situations arise, I’m going to let it take care of itself. But right now, I’m a Dallas Maverick and that’s what it’s about.” On Friday, Marion made news by stating flatly that if a lottery-bound team tries to trade for him, he just won’t go. He was simply giving an honest answer to a reporter’s question about the looming trade deadline. The reality is that teams that aren’t in the playoff hunt won’t be in the market for a 34-year-old who is making $8.4 million this season and $9.3 million next season, anyway. So Mavericks vice president of basketball operations Donnie Nelson needn’t worry that Marion is hurting Dallas’ ability to make a blockbuster deal involving Marion. “The fact that Shawn recently expressed an interest to stay here?” Nelson said. “Well, it’s mutual. We’re looking for guys like that. Shoot, the guy guards three-and-a-half positions? That’s a commodity.”